Algebra

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Find X such that the point (X, 8) is 13 units from (7, -4)

  • Algebra -

    √((x-7)^2 + 12^2) = 13
    square both sides and expand
    x^2 - 14x + 49 + 144 = 169
    x^2 - 14x +24 = 0
    (x-12)(x-2) = 0
    x = 12 or x = 2

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