x^3-2x^2-4x-1 byx+1
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(x³-2x²-4x-1)÷(x+1)
g(x)=x-1=0
x=1
p(1)=1³-2(1)²-4(1)-1
♠1-2(1)-4-1
♠1-2-4-1
♠-6
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