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August 30, 2014

August 30, 2014

Posted by **Michaela** on Sunday, February 6, 2011 at 8:01pm.

8x^3-125

81x^-625

18x^3+63x^2-50x-175

x^4-11x^2+18

I'm so lost!

- algebra -
**bobpursley**, Sunday, February 6, 2011 at 8:20pmdifferece of cubes

differece of cubes

9x^2(2x+7)-25(2x+7) then gather the common factor, to (2x+7)(9x^2-25), and now the second term is a differece of squares, so It can be factored.

Last

(x^2-9)(x^2-2) both of these terms are difference of squares. (last term (x-sqrt2)(x+sqrt2)

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