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Can someone help me solve the following equation?

$$ 3z^3 + 2z^2 = 6z-4 $$

Thanks in advance!

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2 Answers 2

up vote 1 down vote accepted

If $P(z)=3z^3+2z^2-6z+4$, then $P(-2)=0$ so you can factorize $P$; thus, you only have to solve an equation of degree two.

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That was easy ! Thanks ! –  yuta Nov 30 '12 at 17:57

Your equation has $z=-2$ as one of its roots. You should be able to take it from there.

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