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12 April, 21:41

If a=5x^2+3x-7 and b=-3x^2-7x+5 find b-a

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  1. 12 April, 22:27
    0
    -8x^2-10x+12

    Step-by-step explanation:

    first set up the problem:

    (-3x^2-7x+5) - (5x^2+3x-7)

    Since you are subtracting you need to distribute the (-) sign:

    (-3x^2-7x+5) (-5x^2-3x+7)

    Now just combine like terms

    -3x^2 + (-5x^2 = - 8x^2

    (-7x + (-3x = - 10x

    5+7 = 12

    set answer in standard form:

    -8x^2-10x+12
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