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9 December, 01:26

Write x^2-12x+8 in vertex form.

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  1. 9 December, 04:45
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    The vertex form: y = a (x - h) ² + k

    y = ax² + bx + c then h = - b/2a and k = f (h).

    y = x² - 12x + 8

    a = 1; b = - 12; c = 8

    h = - (-12) / (2·1) = 12/2 = 6

    k = f (6) = 6² - 12·6 + 8 = 36 - 72 + 8 = - 28

    Answer: y = (x - 6) ² - 28.
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