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23 November, 15:22

Factor

5x3 + 30x2-15x

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  1. 23 November, 17:18
    0
    5x³ + 30x² + 15x

    Take out a common factor of 5x : 5x (x² + 6x + 3)

    The factors of the quadratic portion are [ x - (-3 + √6) ] and [ x - (-3 - √6) ].

    So finally, we wind up with:

    5x (x + 3 - √6) (x + 3 + √6).
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