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March 28, 2017

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I can't get the right answer to this problem...what am I doing wrong?
(2x-4)(x+1)^2
(2x-4)(x^2+2x+2)
2x^3+4x^2+4x-4x^2-8x-8
2x^3-4x-8 but the answer I'm supposed to get is 2x^3-6x-4
what am I doing wrong? Please help! thanks

  • Algebra2 - ,

    (x + 1)^2 = x^2 + 2x + 1

    You added to get the last term rather than multiplying.

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