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math

posted by on .

completing the square

2m^2-m-15=0

using the quadratic formula

2y^2-3y-6=0

  • math - ,

    2m^2 - m = 15
    m^2- (1/2)m = 15/2
    m^2 - (1/2)m + 1/16 = 15/2 + 1/16
    (m - 1/4)^2 = 121/16
    m - 1/4= ± 11/4
    m = 1/4 ± 11/4
    m = 3 or m = -5/2

    the second one is simply subbing into the formula and number-crunching.
    let me know what you got.

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