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Quadratic equation part 2 | Quadratic equations | Algebra I | Khan Academy

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    Wamkelekile kwicandelo lesibini lwentetho nge
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    "quadratic equation'.
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    Kulungile ndiyacinga ukuba ndinibhidekisile kwixesha elidlulileyo
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    ngoko ke mandijonge ukuba ndingayilunmgisa na lonto kancinci ngokwenza
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    imizekelwana eliqela.
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    Ngoko ke masiqale ngokujonga isishwakathelo sokuba yintoni
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    i'quadratic equation".
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    Ithi i"quadratic equation", ukuba ndizama ukusombulula
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    inxaki "Ax" ophindwe kabini dibanisa "Bx" dibanisa "C" lingana no 0, kwangoko i-
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    sisombululo oaknaye izisombululo ngoba ngokwesi qhelo zibambini
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    phinda-phinda lanto idibana kumgca osembndini ongu "x", okanye zimbini izisombululo
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    zalena inxaki ngu 'x' ulingana nothabatha 'B' dibanisa okanye thabatha ingcambu
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    ka 'B' ophindwe kabini thabatha 4 phinda-phinda 'A' phinda-phinda 'C'.
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    Kwaye yonke lonto uyibeka ngaphezu ko'2A'.
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    Ngoko ke masenze inxaki kwaye ndiyathemba lento ifanele ukwena
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    kancinci imvakalelo.
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    Ngu 2 ongezantsi.
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    Ngoko ke masithi bendinenxaki, thbatha '9x' ophindwe kabini thabatha
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    '9x' dibanisa 6 ilingana no0.
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    Ngoko ke lomzekelo ngubani u'A'?
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    Kulungile, 'A' ngumlingani ka 'x' ophindwe kabini.
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    Esi simeli u'x" ophindwekabini ulapha, umlingani wakhe ngu thabatha 9.
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    Ngoko ke masibhale lonto.
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    'A' lingana no thabatha 9.
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    Ulingana nabani u'B'?
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    'B' ngumlingane wesimeli u'x', ngoko ke esisimeli silaopha.
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    Ngoko ke u'B' ukwalingana no thabatha 9.
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    Kwaye u'C' sisimeli esingatshintshiyo, ngokwalomzekelo ngu6.
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    Ngoko ke 'C' ulingana no 6.
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    `Ngoku sizaku vela sitshintshe sifke lamanani kubuqu
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    be"quadratic equation".
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    Ngoko ke thabtha 'B', ngoko kengu thabatha phinda-phinda thabatha 9.
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    ngu 'B'.
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    Dibanisa okanye thabatha ingcambu ka'B' ephindwe kabini, ngoko ke ngu 81.
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    Akunjalo?
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    Thabatha 9 ophindwe kabini.
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    Thabahta 4 phinda-phinda ngo thabatha 9.
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    Ngu 'A'.
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    Phinda-phinda 'C', ngokucacileyo ngu 6.
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    Kwaye yonke lonto ibekwe ngaphezu ko 2 phinda-phinda ngo thabatha 9, ngokucacileyo
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    ngu thabatha 18, akunajalo/
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    2 umphinda-phinda ngo thabtha 9-- '2A'.
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    Masizame ukuyicazulula lento apha.
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    Kulungile, thabatha thabatha 9, ngudibanisa 9.
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    Dibanisa oakanye thabatha ingcambu ka 81.
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    Masibone.
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    Lento ngu thabatha 4 uphinda-phinda ngo thabatha 9.
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    Uthabatha 4 umphinda-phinde ngo thabatha 9 ngu dibanisa 36.
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    Kwaye kwangoko dibanisa 36 umphinda-phinde ngo 6 ngu--masibone.
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    30 umphinda-phinde ngo 6 ngu 180.
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    Kwaye kwangoko 180 dibanisa omnye u36 ngu 216.
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    Dibanisa 216, ilungile lanto/
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    180 dibanisa 36 ngu 216.
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    Yonke lanto uyibeke ngaphezu ko '2A'.
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    '2A' besesitshilo sathi ngu thabatha 19.
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    Ngoko ke cazulula lonto kakhulu.
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    Ngu 9 dibanisa okanye thabatha ingcambu ka 81 dibanisa 216.
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    Ngu 80 dibanisa 217.
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    Ngu 297.
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    Kwaye yonke lanto uyibhale ngaphezu ko thabatha 18.
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    Ngoku, lento ngqo ngu--elona candelo linzima nge "quadratic
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    equation" ngamaxesha ohlukeneyo vela ucazulule lento unayo.
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    Kufuneka sijonge phandle ukuba asinokwazi ukuyicazulula lento ngokugqibeleleyo.
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    Kulungile, masibone.
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    Indlela enye yokujonga lento phandle ukuba inani liyohluleka ngo 9 kuku
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    dibanisa gqo imivo kwaye sibone ukuba imivo
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    iyakwazi ukuhluleka ngo 9.
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    Kwelicandelo, ngu.
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    2 dibanisa 9 dibanisa 7 ilingana no 18.
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    Ngoko ke masibone ngamatyeli amangaphi u9 ayangawo kulanto.
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    Ndizakuyenza ecaleni apha, andifuni ukudakisa kakhulu.
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    9 umse ku 297.
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    3 umphinda-phinde ngo27.
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    27-- uya amatyeli ayi33, akunjalo?
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    Ngoko ke lento iyafana no 9 dibanisa okanye thabatha ingcambu
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    ka 9 uyiphinda-phinde ngo 33 thbabtha 18 ngaphantsi.
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    Kwaye 9 yeyona ngcambu yoqobo.
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    Yiyo lonto bendifuna ukubona ukuba u9 angasebenza ngoba
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    yeyona ndlela bendinokuphuma ngayo ngokugqibeleleyo, ukuba
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    yeyona ngcambu yokwenene.
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    Njengokuba ufundile kulamigaqo yezalathi kulam'miselo wokuqala.
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    Ngoko ke lento ilingana no 9 dibanisa oakanye thabatha 3ingcambu ka
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    33, kwaye yonke lanto ngaphezu ko thabatha 18.
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    Sesigqibile.
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    Singayicazulula ngoba 9,3 kunye nothabatha 18
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    zonke ziyahluleka ngo 3.
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    Masiyohlule yonke lanto ngo 3.
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    3 dibanisa okanye thabatha ingcambu ka33 ngaphezu ko thabatha 6.
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    Kwaye sigqibile.
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    Ngoko ke njengokuba ubona, eyonanto inzima nge "quadratic
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    equation" kukusuka nje qha ucazulule into oyinikiweyo.
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    Kodwa itno besiyithethile, ndiyayazi ungaba kanti uyilahlile indlela--senzile
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    yonke lento izibalo--njengokuba besitshilo, lenxaki: thabatha '9x'
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    ophindwe kabini thabatha '9x' dibanisa 6.
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    Ngoku sifumene amanani amabini amelwe ngu 'x' ezinokuyanelisa lenxaki
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    kwaye iyenze ilingane no 0.
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    Omnye u'x' ulingana no3 dibanisa ingcambu
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    ka 33 ngaphezulu dibanisa 6.
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    Kwaye elesibini ngu 3 thabatha incambu
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    ka 33 ngaphezulu thabatha 6.
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    kwaye ungafuna ukucinga ukuba kutheni sino
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    dibanisa okanye uthabatha.
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    Sinala dibanisa okanye thabatha ngoba ingcambu ingaba
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    gqo linani elidibanisayo okanye elithabathayo.
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    masenze enye inxaki.
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    Ngethemba lena ingaba lula kancinci.
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    Masithi ndifuna ukusombulula uthabatha '8x' ophindwe kabini
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    dibanisa '5x' dibanisa 9.
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    Ngoku ndizakuthatha ngathi siyinqayile i"quadratic
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    equation" ngoba yinto ekufanele uyenze.
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    Okanye ungayibhala phantsi kwiphwetsha.
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    Kodwa i"quadratic equation" ngu thabatha 'B'-- ngoko ke u'b' ngu 5,
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    Sizama ukuyisombulula ilingana no0, ngoko ke thabatha 'B'
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    Ngoko ke thabatha 5, dibanisa okanye thabatha ingcambu ka 'B' ophindwe kabini-
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    ngu 5 ophindwe kabini, 25.
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    Thabatha 4 umphinda-phinde ngo 'A', ngoklucacileyo nguthabatha 8.
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    Phinda-phinda ngo 'C', ngolkucacileyo ngu 9.,
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    Kwaye yonke lonto ingaphezulu kuka 2 umphinda-phinde ngo 'A'.
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    Kulungile, 'A' ngu thabatha 8, ngoko ke yonke lanto uyibeke ngaphezu kuka thabatha 16.
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    Ngoko ke masicazulule lento sinayo apha.
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    Kulungile, ilingana no thabatha 5 dibanisa oakanye thabatha
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    ingcambu ka 25.
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    Makheibone.
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    4 umphinda-phinde ngo 8 ngu 32 kwaye uthabatha uyaphuma ngaphandle, ngoko ke
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    ngu dibanisa 32 phinda-phinda 9.
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    Dibanisa 32 umphinda-phinde ngo 9, makhe sibone.
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    30 umphinda-phinde ngo 9 ngu 270.
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    Ngu 288.
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    Ndiyacinga.
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    Kunjalo?
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    288.
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    Sinayo yonke lanto ngaphezulu ku thabatha 16.
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    Ngoku yicazulule kakhulu.
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    Thabatha 5 dibanisa oakanye thabatha ingcambu--25 dibanisa
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    288 ngu 313 ndiyakholelwa.
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    `Kwaye yonke lanto ingaphezulu kuka thabatha 16.
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    Kwaye ndiyacinga, andikho 100% ngokuqinisekileyo, nangona ndiqinisekile.
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    Khange diyitshekitshe.
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    Laa 313 akasoze abe linani elingenayo kuphinda-phindo lwe
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    ngcambu yoqobo kwaye nelinye inani.
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    Ngokom'miselo, ingaba linani lodidi lokuqala.
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    Ngeyo nanto onokufuna ukuyijonga.
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    Ngoko ke ukuba leyo yindlela kwaye siyifumene ngokupheleleyo
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    ngendlela ecaulweyo, kwaye sathi simbini izisombululo, mabini
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    amanani amlwe ngu 'x' anokwena inxaki ibe yinyaniso.
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    Elinye lawo ngu 'x' ulingana no thabatha 5 dibanisa
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    ingcambu ka 313 ngaphezulu ko thabatha 16.
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    Kwaye enye ingcambu ngu 'x' ulingana no thabatha 5 thabatha
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    ingcambu ka 313 ngaphezulu ka thabatha 16.
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    Ngethemba yomibini lemizekelo izakunika imvakalelo elungilelo
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    ngendlela yokusebenzisa i"quadratic equaton'.
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    Ndinga dibanisa emininzi imiyalelo eqinqiweyo.
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    Kwaye kwangoko, ukubalasela kwakho kulento, ndizakufundisa ungeza njani
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    ukusombulula i"quadratic equation' xa ufumana amanani athabathayo
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    ngokugqibeleleyo.
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    Inikisa umdla kakhulu.
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    Ngenye indlela, ndiyathemba ungenza imimiselo eqinqiweyo kwaye mhlawumbi ndizakudibanisa
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    ezimbalwa ubuninzi intetho ngoba lona akalulanga kwaphela lomlinganiso.
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    Ndiyathemba ukuba ubuyo nwabele.
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    Kulungile.
Title:
Quadratic equation part 2 | Quadratic equations | Algebra I | Khan Academy
Description:
more » « less
Video Language:
English
Team:
Khan Academy
Duration:
09:14

Xhosa subtitles

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