问题标题:
计算(ab-a²)÷a²-2ab+b²/ab·a-b/a²的结果是?
问题描述:
计算(ab-a²)÷a²-2ab+b²/ab·a-b/a²的结果是?
乔月圆回答:
(ab-a²)÷(a²-2ab+b²)/ab*(a-b)/a²
=a(b-a)÷(a²-2ab+b²)/ab*(a-b)/a²
=a(b-a)÷(a-b)²/ab*(a-b)/a²
=a(b-a)*ab/(a-b)²*(a-b)/a²
=-a(a-b)*ab/(a-b)*1/a²
=-a*ab*1/a²
=-a²b*1/a²
=-b
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