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29 February, 00:06

If a = 3x^2+5-6 and b=-2x^2-6x+7 then a - b equals

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  1. 29 February, 00:13
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    a-b = 5x² + 6x - 8

    Step-by-step explanation:

    a = 3x² + 5 - 6 ⇒ 3x² - 1

    b = - 2x² - 6x + 7

    a-b

    3x² - 1 - (-2x² - 6x + 7)

    3x² - 1 + 2x² + 6x - 7

    5x² + 6x - 8
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