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11 November, 09:48

What is the factorization of the polynomial below? - 3x^3+15x^2+42x

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  1. 11 November, 10:13
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    Factoring out x

    x (-3x^2+15x+42) now factor parenthetical expression

    x (-3x^2+21x-6x+42)

    x (-3x (x-7) - 6 (x-7))

    x (-3x-6) (x-7) we can factor out - 3 from first parentheses

    -3x (x+2) (x-7)
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