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(X+3)(X-2) =0
▪X1 = -3 atau ▪X2 = 2
2. X^2 +X -12 =0
(X+4)(X-3) =0
▪X1=-4 atau ▪X2=3
3. X^2 -7X +12 =0
(X-3) ( X-4)
▪ X1 = 3 atau ▪X2 = 4