SOLUTION: (3x-2)^3=9x^2-6. Did I do this problem right? I just want to make sure before I hand it in. If not, could you show me what I did wrong? Thank you.

SOLUTION: (3x-2)^3=9x^2-6. Did I do this problem right? I just want to make sure before I hand it in. If not, could you show me what I did wrong? Thank you.

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Question 34066: (3x-2)^3=9x^2-6. Did I do this problem right? I just want to make sure before I hand it in. If not, could you show me what I did wrong? Thank you.

Answer by fanism(39) (Show Source): You can put this solution on YOUR website!
you cannot simply cube each number seperatly...
(3x-2)^3
= (3x-2)(3x-2)(3x-2)
= (9x^2 - 12x + 4)(3x-2)
= 27x^3 - 54x^2 + 36x - 8
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