Question

If possible, factor 225x2 − 9y2

Answer 1

9(5x + y)(5x -y)

Explanation:

You can just factor out 9 first.

9(25x^2 - y^2)

Then you can use difference of squares formula:

9(5x + y)(5x -y)

Answer 2

9(5x+y)(5x-y)

Explanation: