algebra

Given the quadratic function f(x)=9x^2-36x+36 find a value of x such that f(x)=9

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  1. 9x^2-36x+36 = 9

    9x^2-36x+27 = 0

    Factor. Get two factors from each of the end terms that will add to the value of the middle term.

    (3x-9)(3x-3) = 0

    Set each factor = 0 and solve.

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