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difference is 7, product is 30

  • math - ,

    3 and 10

  • math - ,

    a * b = 30 .....1
    a - b = 7 ..... 2
    a = 7 + b ......3

    (7+b)(b)=30
    b^2+7b-30=0
    (using quadratic formula)

    b = -10 or b = 3
    a = -3 or a = 10

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