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

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

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

(1)(a²-ab)÷(ab分之b-a ) (2)(x²-1分之x+3)÷(x²-2x+1分之(x+3)(x-1))
1)=a(a-b)x(b-a分之ab) 2)= (x+1)(x-1)分之x+3乘以 (x+3)(x-1)分之(x-1) ²
=a(a-b)x(-a-b分之ab) =x+1分之1乘以x-1分之x-1
=ax(-ab) =x+1分之1乘以1
=-a²b =x+1分之1
应该对的……看我打这么辛苦给个辛苦分吧

1. -(a^2)b
2. 1/(x+1)

1、原式=a(a-b)÷(b-a/ab)=-(a-b)²/b
2、原式=(x+3)/(x-1)(x+1)·(x-1)²/(x+3)(x-1)=1/(x+1)