(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2 则 A a=-7 B a=7 C a=7x D a=-7x

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(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2 则 A a=-7 B a=7 C a=7x D a=-7x
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(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2 则 A a=-7 B a=7 C a=7x D a=-7x
(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2 则 A a=-7 B a=7 C a=7x D a=-7x

(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2 则 A a=-7 B a=7 C a=7x D a=-7x
令x=1
(1-2+a+2)÷(-2)=3
1+a=-6
a=-7
A a=-7

(x^3-2x^2+ax+2)÷(x^2-4x+1)=x+2
x^3-2x^2+ax+2=(x^2-4x+1)(x+2) = x^3-4x^2+x+2x^2-8x+2 = x^3-2x^2-7x+2
a = -7
D正确