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×pangkat3 +4×+62
x³ +x² -10 x -6 = x³ + 4 x² +2x + b x² + 4b x + 2b
x³ +x² -10 x -6 = x³ + (4+b) x² +(2+4b)x + 2b
dari penyesuaian itu diperoleh 2b = -6 .... b= -3
maka hasil baginya x - 3