What expression raised to the fourth power is -8x^6y^9z^15

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- Jun 27th 2008, 07:13 PM #1

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- Jun 27th 2008, 07:17 PM #2

- Jun 27th 2008, 07:21 PM #3

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- Jun 27th 2008, 07:24 PM #4

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- Jun 27th 2008, 07:26 PM #6
Well....we want to find $\displaystyle \varphi$ (our expression)

If $\displaystyle \varphi^3=-8x^6y^9z^{15}$ then $\displaystyle \varphi=\sqrt [3] {-8x^6y^9z^{15}}\implies\varphi=-2x^2y^3z^5$.

This is not $\displaystyle y^3-y+6$...are you sure that this was the answer?

- Jun 27th 2008, 07:35 PM #7

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## Thank You All So Very Much!!

I am clueless with algebra.. have failed every class i have taken with it... even after tutors and HOURS of studying and reading examples.. now I have 29 problems and only 3 and 1/2 hours to get them done! :+(

thanks again all! I admire YOU ALL!!

- Jun 27th 2008, 07:50 PM #8