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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2. 👎 0
3. 👁 113
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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2. 👎 0

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