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2 July, 23:17

Factor x2 - 8x + 15. Which pair of numbers has a product of ac and a sum of b?

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  1. 2 July, 23:43
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    AC = (-5) (-3)

    sum = - 8

    x^2 - 5x - 3x + 15

    x (x-5) - 3 (x-5)

    (x-3) (x-5)

    x=3 x=5
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