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0 = x² + x - 12
0 = (x+4)(x-3)
x = - 4
x = 3
titik potong sumbu x adalah ( -4,0) dan (3,0)
sumbu y ----> x = 0
y = x² + x - 12
y = 0 - 0 - 12
y = -12
titik potong sumbu y adalah (0,-12)