y ≤ x2 – 2x – 24 y ≤ -x2 – 5x + 14
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y ≤ x2 – 2x – 24
y ≤ -x2 – 5x + 14
Jawab:
y ≤ x2 – 2x – 24
Titik potong sumbu x (y = 0):
x2 – 2x – 24 = 0
(x – 6)(x + 4) = 0
x = 6 atau x = -4
(6, 0) (-4, 0)
Titik potong sumbu y (x = 0):
y = 02 – 2(0) – 24 = -24
(0, -24)
y ≤ -x2 – 5x + 14
Titik potong sumbu x (y = 0):
-x2 – 5x + 14 = 0
(-x + 2)(x + 7) = 0
x = 2 atau x = -7
(2, 0) (-7, 0)
Titik potong sumbu y (x = 0):
y = -02 – 5(0) + 14 = 14
(0, 14)
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