Titik Puncak dari Grafik fungsi kuadrat f(x)= -x² + 4x -6 adalah
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x = -b = -(4) = -4 = 2
2a 2(-1) -2
y = D = b² - 4ac = (4)² - 4(-1)(-6) = 16 - 24 = -8 = -2
-4a -4a -4(-1) 4 4
(2,-2)