What is m to the power of 2 minus 11m minus 60 in product/sum method

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What is m to the power of 2 minus 11m minus 60 in product/sum method

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    2021-09-20T23:39:33+00:00

    m^2 -11m -60 = 0

    m^2 -11m =60

    (m^2 -11m + 121/4) = 361/4

    (m – 11/2)^2 = 361/4

    m – 11/2 = + or – 19/2

    m = 11/2 + 19/2, 11/2 – 19/2

    m = 15, -4

    —————————————————

    m^2 -11m -60

    (11 +- Square root (121 +240))/2

    11/2 +- 19/2

    m= 15, -4

    —————————————————-

    m^2 -11m -60

    (m – 15) (m + 4)

    m = 15, -4

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