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17 November, 11:09

Find all roots: x^3-7x^2-12x = 0

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  1. 17 November, 14:22
    0
    The roots are 0, 3 and 4.

    Step-by-step explanation:

    x^3-7x^2-12x = 0 Take out x:

    x (x^2 - 7x - 12) = 0 Factor the expression in the brackets:

    x (x - 3) (x - 4) = 0

    x = 0 or x - 3 = 0 or x - 4 = 0, so

    The roots are 0, 3 and 4.
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