Posted by **Anonymous** on Thursday, December 11, 2008 at 8:20pm.

How would 3x^2-27y^2 be factored completely?

- algebra 2 -
**bobpursley**, Thursday, December 11, 2008 at 8:23pm
isnt it the difference of two squares?

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

- algebra 2 -
**bobpursley**, Thursday, December 11, 2008 at 8:36pm
Of course. If one technique works to factor a polynomial, it is factored.

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