=2(x-3)/(x-2)²×1/(x+3)×(x+3)(x-2)/(x+3)=2(x-3)/(x-2)(x+3)=(2x-6)/(x²+x-6) 感觉有一个你式子中的某一个 +3 应该是 -3
(2X-6)/(X^2+X-6)
