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3 May, 05:11

Simplify (8x2 - 1 + 2x3) - (7x3 - 3x2 + 1). I don't understand what I'm doing wrong.

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Answers (2)
  1. 3 May, 06:15
    0
    -5x3 + 11x2 - 2 i think this is it
  2. 3 May, 07:58
    0
    Did you distribute the negative 1 across the second term?

    8x^2-1+2x^3-7x^3+3x^2-1

    The answer should be - 5x^3 + 11x^2
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