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20 September, 05:56

If the difference of two numbers is 7 and their product is 60, what are they?

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  1. 20 September, 06:20
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    X - y = 7 ... x = y + 7

    x * y = 60

    y (y + 7) = 60

    y^2 + 7y = 60

    y^2 + 7y - 60 = 0

    (y + 12) (y - 5) = 0

    y + 12 = 0

    y = - 12 ... not this one because it is negative

    y - 5 = 0

    y = 5 <===

    x - y = 7

    x - 5 = 7

    x = 7 + 5

    x = 12 <==

    so ur 2 numbers are 12 and 5
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