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18 August, 14:00

What is a solution to (x 6) (x 2) = 60? x = - 6 x = - 4 x = 4 x = 12

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  1. 18 August, 14:25
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    (x+6) (x+2) = 60

    expand

    x^2+6x+2x+12=60

    x^2+8x+12=60

    minus 60 both sides

    x^2+8x-48=0

    factor

    what multiplies to - 48 and adds to 8

    -4 and 12

    (x-4) (x+12) = 0

    set each to zero

    x-4=0

    x=4

    x+12=0

    x=-12

    x=4 or - 12

    solutions are x=-12 and 4
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