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y=2x^2+3x-2
y=2.0^2+3.0-2
y=2
Jika y=0 (sumbu x)
y=2x^2+3x-2
0=2x^2+3x-2
0=(2x - 1)(x + 2)
2x - 1 = 0 atau x + 2 = 0
2x = 1. x = -2
x = 1/2