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(x+10)(x-1) = 0
X1 = -10
X2 = 1
Akar2 baru :
Y1 = -10+3 = -7
Y2 = 1+3 = 4
Pers baru :
(y+7)(y-4) = 0
y²-4y+7y-28 = 0
y²+3y-28 = 0