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21 March, 06:51

Multiply (5x2 + x - 4) (x + 2).

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  1. 21 March, 07:17
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    (5x^2 + x - 4) (x + 2) =

    x (5x^2 + x - 4) + 2 (5x^2 + x - 4) = 5x^3 + x^2 - 4x + 10x^2 + 2x - 8 =

    5x^3 + 11x^2 - 2x - 8 <===
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