Posted by **Tawny** on Saturday, October 16, 2010 at 8:27pm.

How do I solve:

-9x + 2x to the third power +8x -12x to the third power

- Math -
**drwls**, Saturday, October 16, 2010 at 8:58pm
Isn't there suppsed to be an "=" sign in there somewhere? If so, where?

You can't "solve" it if it isn't an equation.

- Math -
**Bosnian**, Sunday, October 17, 2010 at 12:10am
-9x+2x=-7x

(-7x)^3=(-7)^3 *x^3=-343x^3

8x-12x=-4x

(-4x)^3=(-4)^3 *x^3=-64x^3

-343x^3 +(-64x^3)=

-343x^3-64x^3= -407x^3

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