## Full on Factoring - College Algebra

• 0:00 - 0:04
>> The first thing we need to do, as always, is think about what adds to equal
• 0:04 - 0:08
4, and multiplies to equal 4 times 1, or 4? In this case, our numbers are 2 and
• 0:08 - 0:12
2. So instead of 4x, we can write 2x plus 2x, and of course the rest of the
• 0:12 - 0:16
expression as well. Then something interesting happens when we try to factor the
• 0:16 - 0:20
first two terms and the second two terms. The first two are pretty normal, we
• 0:20 - 0:24
pull out a 2x from the 4x squared plus 2x, but then when we get to 2x plus 1
• 0:24 - 0:29
Well there are no common factors that 2x and 1 have aside from 1. So that's
• 0:29 - 0:34
exactly what we write, 1. And then the last two terms, 2x plus 1. Conveniently,
• 0:34 - 0:40
this still works out perfectly and we get 2x plus 1 times 2x plus 1. Which we
• 0:40 - 0:43
can also write as 2x plus 1 the quantity squared.
Title:
Full on Factoring - College Algebra
Video Language:
English
Team:
Udacity
Project:
MA008 - College Algebra
Duration:
0:44
 Udacity Robot edited English subtitles for Full on Factoring - College Algebra Cogi-Admin added a translation

# English subtitles

## Revisions Compare revisions

• API
Udacity Robot