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15 February, 22:53

Group factor 7x^2+21xy-4xy-12y^2

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  1. 16 February, 00:12
    0
    (x + 3y) (7x - 4y)

    Step-by-step explanation:

    Factor by grouping the first / second terms and third / fourth terms

    = 7x (x + 3y) - 4y (x + 3y)

    take out the common factor (x + 3y)

    = (x + 3y) (7x - 4y)
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