•
f(x) = -x²- 2x + 3
titik balik/puncak
x = -b/2a
x = -(-2)/2(-1)
x = -1
y = f(-1) = -(-1)² - 2(-1) + 3
y = 4
Titik balik = (-1,4)
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•
f(x) = -x²- 2x + 3
titik balik/puncak
x = -b/2a
x = -(-2)/2(-1)
x = -1
y = f(-1) = -(-1)² - 2(-1) + 3
y = 4
Titik balik = (-1,4)