Factoring Question

D

debbie29

New member
Joined
Jul 19, 2005
Messages
14
The question:
3x^7y^2+ 24xy^8

So far I have:
3x*y^2(x^6 + 8y^6)
3x*y^2(x^6 + 8y^6) =3x*y^2( (x^2)^3 + (2*y^2)^3 )

After that point, I'm stuck. What do I do?!?!?!
 
Apply the sum-of-cubes formula.

. . . . .a<sup>3</sup> + b<sup>3</sup> = (a + b)(a<sup>2</sup> - ab + b<sup>2</sup>)

Eliz.
 
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