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August 21, 2014

August 21, 2014

Posted by **Ashley R** on Friday, September 13, 2013 at 11:29pm.

(please show step by step)

-8z^3 + 512w^3

- Math -
**Reiny**, Saturday, September 14, 2013 at 12:06amI see cubes all over the place, you should be familiar with the factors of A^3 + Bb^3 = (A+B)(A^2 - AB + B^2) and its equivalent of A^3 - B^3

-8z^3 + 512w^3

= -(8z^3 - 512w^3)

= - (5z - 8w)(25z^2 + 40wz + 64w^2)

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