x-1分之x+2 除 x^2-x-6分之x^2-2x+1 减 x^2-9分之2x+6
问题描述：
x-1分之x+2 除 x^2-x-6分之x^2-2x+1 减 x^2-9分之2x+6
答
=(x+2)/(x-1)× (x-1)^2/(x-3)(x+2)=2(x+3)/(x+3)(x-3)你的第一个除,我换成了乘
=(x-1)/(x-3) -2/(x-3)
=1