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Can someone help me solve the following equation?

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

Thanks in advance!

2 Answers 2

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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 !2012-11-30
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Your equation has $z=-2$ as one of its roots. You should be able to take it from there.