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5 October, 08:52

Factor completely: 10x2 + 2x - 8

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  1. 5 October, 09:19
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    The answer is 2 (5x - 4) (x + 1)

    10x² + 2x - 8 = 2*5x² + 2*x - 2*4 =

    = 2 (5x² + x - 4) =

    = 2 (5x² + 5x - 4x - 4) =

    = 2 (5x * x + 5x*1) - (4*x + 4*1) =

    = 2 (5x (x + 1) - 4 (x + 1)) =

    = 2 (5x - 4) (x + 1)
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