(1)(a²-ab)÷(ab分之b-a ) (2)(x²-1分之x+3)÷(x²-2x+1分之(x+3)(x-1))

问题描述:

(1)(a²-ab)÷(ab分之b-a ) (2)(x²-1分之x+3)÷(x²-2x+1分之(x+3)(x-1))