magenporter
magenporter
09-08-2016
Mathematics
contestada
Write x2 + 4x - 2 in vertex form.
Respuesta :
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 + 4x - 2
a = 1; b = 4; c = -2
h = -4/(2·1) = -4/2 = -2
k = f(-2) = (-2)² + 4·(-2) - 2 = 4 - 8 - 2 = -6
Answer: y = (x + 2)² - 6.
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