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4 July, 12:45

If M=5x^2+7x-4 and N=-3x^2-4x+5, then M-N equals

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  1. 4 July, 13:13
    0
    8x² + 11x - 9

    Step-by-step explanation:

    M - N

    = 5x² + 7x - 4 - 1 ( - 3x² - 4x + 5) ← distribute parenthesis by - 1

    = 5x² + 7x - 4 + 3x² + 4x - 5 ← collect like terms

    = 8x² + 11x - 9
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