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9 August, 20:41

Use the grouping method to factor 2x^3 + 6x^2 - 7x - 21.

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  1. 9 August, 22:11
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    (2x^2-7) (x+3)

    Explanation:

    Now, when we write a polynomial, we write it from high order to low order, which the polynomial is already in that form. Then, we factor the first and last two terms.

    To factor 2x^3 and 6x^2, 2x^2 is the common factor

    2x^2 (x+3) - 7x-21

    in - 7x-21, - 7 is the common factor, so our end result is

    2x^2 (x+3) - 7 (x+3), and this can be rewritten as:

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