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berarti a=1 , b=2 , c=-323
rumus ABC
X1,2=(-b±√b²-4ac)/2a
=(-2±√2²-4.1.(-323))/2.1
=(-2±√1296)/2
=(-2±36)/2
jadi
X1 = (-2+36)/2 = 17
X2 = (-2-36)/2 = -19