分式子通分*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))*(4/(a+2))+a-2+a-2 [(a+2)(a-2)/(a+2)]
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分式子通分*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))*(4/(a+2))+a-2+a-2[(a+2)(a-2)/(a+2)]分式子通分*((x^2-2x+1)/(x^2
分式子通分*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))*(4/(a+2))+a-2+a-2 [(a+2)(a-2)/(a+2)]
分式子通分
*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))
*(4/(a+2))+a-2
+a-2
[(a+2)(a-2)/(a+2)]
分式子通分*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))*(4/(a+2))+a-2+a-2 [(a+2)(a-2)/(a+2)]
(1)[(x^2-2x+1)/(x^2-1)]/[(x-1)/(x^2+x)]
=(x-1)^2/[(x+1)(x-1)]*{[x(x+1)]/(x-1)}
=(x-1)/(x-1)*x
=x
(2)[4/(a+2)]+a-2
=[4/(a+2)]+[(a+2)(a-2)/(a+2)]
=a^2/(a+2)
(1) X
(2) a^2/(a+2)
分式子通分*((x^2-2x+1)/(x^2-1))/((x-1)/(x^2+x))*(4/(a+2))+a-2+a-2 [(a+2)(a-2)/(a+2)]
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