## ← Sum and Difference of Cubes - College Algebra

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

1. This is a difference of two cubes, and the first term, the positive term, is in
2. the slot where y cubed initially was. So that means that x is used here in place
3. of y. Instead of z cubed, we have 8. So that means that 8 is equal to z cubed.
4. If we take the cube root of both sides of this equation, we get 2 on the left
5. side and z on the right side. So z must equal 2.