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15 May, 08:33

Find the zeros of the function. f (x) = 4x3 - 12x2 - 40x

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  1. 15 May, 09:01
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    First take out the GCF which is 4x

    4x (x^2 - 3x - 10) = 0

    4x (x - 5) (x + 2) = 0

    4x = 0 so x = 0

    x - 5 = 0 so x = 5

    x+2 = 0 so x = - 2

    zeros are - 2, 0 and 5
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