I can't figure this out:

0 = x^3 - 4x

What is x?

I could guess for x, but how do I solve this arithmetically?

Thank you,

Patrick

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- Aug 17th 2008, 01:58 PMDonPatriciosimple algebra
I can't figure this out:

0 = x^3 - 4x

What is x?

I could guess for x, but how do I solve this arithmetically?

Thank you,

Patrick - Aug 17th 2008, 02:08 PMskeeter
try factoring the expression on the right side of the equation and using the zero product property to solve for x.

- Aug 17th 2008, 02:08 PMwingless
$\displaystyle 0 = x^3-4x$

Factor an x,

$\displaystyle 0 = (x)\cdot(x^2-4)$

Now, you can see that if one of these factors are zero, then the equation is satisfied.

We're looking for cases where either $\displaystyle x=0$ or $\displaystyle x^2-4=0$.

I think you can solve from here. - Aug 18th 2008, 08:25 PMDonPatricio
Thank you guys. That really helped a lot ..