magenporter
magenporter
09-08-2016
Mathematics
contestada
Write x^2-12x+8 in vertex form.
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dalendrk
dalendrk
09-08-2016
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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