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13 September, 12:05

Add: (3x^2-5x+6) + (-4x^2-8x+9)

A. - x^2-13x+15

B. 7x^2-13x+15

C. - x^2-13x+3

D. 7x^2+3x-3

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  1. 13 September, 12:26
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    A. - x^2-13x+15

    Step-by-step explanation:

    -4x^2 + 3x^2 = - x^2

    -8x + - 5x = - 13x

    6 + 9 = 15

    -x^2-13x+15
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