Tuesday

June 30, 2015

June 30, 2015

Posted by **Fai** on Wednesday, May 2, 2012 at 2:23pm.

- Intermediate algebra -
**Steve**, Wednesday, May 2, 2012 at 3:09pma^2-b^2 = (a+b)(a-b)

first, factor out the 9 to get

9(x^4 - 9y^2)

9(x^2+3y)(x^2-3y)