4x^2 - 4y^2 cant solve this problem

This is a problem of factorization.

Use the identity : a

^{2 }- b^{2 }= ( a + b) ( a - b) here a

^{2}equals 4X^{2 }, and b^{2 }equals 4y^{2 } Then :

4 X

^{2}- 4Y^{2}= ( 2X +2Y) ( 2X - 2y)
## Comments

Hi Jerry,

There must be more to this problem. Was there anything on the right side of the equal sign? What were the instructions for that section of problems? Were you supposed to factor the problem maybe? Give us a little more detail and one of us will be happy to help.