数学-先化简再求值x2-x/x+1 * x2-1/x2-2x+1 .其中x满足 x2-3x+2=0.

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数学-先化简再求值x2-x/x+1 * x2-1/x2-2x+1 .其中x满足 x2-3x+2=0.
数学-先化简再求值
x2-x/x+1 * x2-1/x2-2x+1 .其中x满足 x2-3x+2=0.

数学-先化简再求值x2-x/x+1 * x2-1/x2-2x+1 .其中x满足 x2-3x+2=0.
x2-3x+2=0
(x-1)(x-2)=0
x=1或x=2
x2-x/x+1 * x2-1/x2-2x+1
=x(x-1)/(x+1)*(x+1)(x-1)/(x-1)^2
=x
所以原式=1或2