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20 June, 18:24

If M = 5x squared+7x-4 and N = - 3x squared - 4x + 5, M-N equals

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  1. 20 June, 18:39
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    8x² + 11x - 9

    Step-by-step explanation:

    M - N = 5x² + 7x - 4 - ( - 3x² - 4x + 5)

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

    = 8x² + 11x - 9
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