## ← Keep your zs straight - College Algebra

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Showing Revision 2 created 05/25/2016 by Udacity Robot.

1. Let's do 1 last example using sum and difference of cubes. If we have the
2. expression 125Z cubed minus 1, how can we factor this? Remember that the
3. variables that we picked in the initial original equations are just place
4. holders. It does not matter that we're using the variable Z here and that
5. there's 1 present over here. All that matters in a given expression is the
6. relationship of the 2 terms to one another. The fact that this variable and this
7. variable happen to have the same name does not mean that they are necessarily
8. connected.