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19 February, 10:05

Find k such that (x+2) is a factor of (x^3-kx^2+3x+7k)

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  1. 19 February, 11:24
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    X+2 = 0

    x = - 2

    subs x = - 2 in the equation

    (-2) ^3 - k (-2) ^2 + 3 (-2) + 7k = 0

    -8 - 4k - 6 + 7k = 0

    3k = 14

    k = 14/3
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