y = x^2 - 1
y = x + 1
y = y
x^2 - 1 = x + 1
x^2 - x - 1 - 1 = 0
x^2 - x - 2 = 0
(x - 2)(x + 1) = 0
x - 2 = 0 atau x + 1 = 0
x = 2 atau x = -1
x = -1
y = -1 + 1
y = 0
(-1 , 0)
x = 2
y = 2 + 1
y = 3
(2 , 3)
Hpnya adalah {(-1 , 0) ; (2 , 3)} (a)
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y = x^2 - 1
y = x + 1
y = y
x^2 - 1 = x + 1
x^2 - x - 1 - 1 = 0
x^2 - x - 2 = 0
(x - 2)(x + 1) = 0
x - 2 = 0 atau x + 1 = 0
x = 2 atau x = -1
x = -1
y = x + 1
y = -1 + 1
y = 0
(-1 , 0)
x = 2
y = x + 1
y = 2 + 1
y = 3
(2 , 3)
Hpnya adalah {(-1 , 0) ; (2 , 3)} (a)