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13 December, 04:42

Solve 8m^2+20m=12 for m by factoring.

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Answers (2)
  1. 13 December, 05:12
    0
    This is an equation?
  2. 13 December, 05:12
    0
    First, off, divide both sides by 4 to make things easier

    2m^2+5m=3

    minus 3 both sides

    2m^2+5m-3=0

    factor

    hmm

    experiment

    (2m-3) (m+1), nope

    (2m+3) (m-1), nope

    (2m-1) (m+3), yep

    (2m-1) (m+3) = 0

    set each to zero

    2m-1=0

    2m=1

    m=1/2

    m+3=0

    m=-3

    m=1/2 or - 3
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