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4 May, 12:17

1.) Write f (x) = x2 - 6x + 8 in vertex form

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  1. 4 May, 15:38
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    f (x) = (x - 3) ² - 1

    Step-by-step explanation:

    The equation of a parabola in vertex form is

    y = a (x - h) ² + k

    where (h, k) are the coordinates of the vertex and a is a multiplier

    To obtain this form use the method of completing the square

    Add/subtract (half the coefficient of the x - term) ² to x² - 6x

    f (x) = x² + 2 ( - 3) x + 9 - 9 + 8

    = (x - 3) ² - 1
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