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31 August, 05:49

2x (5+3x) - x find the coefficient of x

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  1. 31 August, 09:16
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    To start, we need to distribute

    multiply 2x by everything in the parenthesis

    2x (5 + 3x) - x

    2x * 5 = 10x

    2x * 3x = 6x²

    now we have ...

    10x + 6x² - x

    simplify

    6x² + 9x

    the coefficient of x is 9!
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