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March 27, 2017

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x^2=8x-9
solve by completing the square to obtain exact solutions

  • math - ,

    x^2 - 8x + .... = -9 + ....
    x^2 - 8x + 16 = -9 + 16
    (x-4)^2 = 7
    x-4 ± √7
    x = 4 ± √7

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