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ALGEBRA II

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THE SUM OF TWO NUMBERS IS 8.5 AND THEIR PRODUCT IS 18. FIND THE NUMBERS?

  • ALGEBRA II -

    Solve
    x + y = 8.5 together with
    xy = 18.

    Try a substitution method,
    y = 18/x

    x + 18/x = 8.5
    x^2 -8.5x + 18 = 0
    (x-4)(x-4.5) = 0
    Take it from there

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