(a²-b²)/ab-(ab-b²)/(ab-a²)+a/b
=a/b-b/a-b/a+a/b
=2a/b-2b/a
当a=-3/2,b=2/3时
原式=2×(-9/4)-2×(-4/9)
=-9/2+8/9
=-65/18你把它写清楚一点(a²-b²)/ab-(ab-b²)/(ab-a²)+a/b=a/b-b/a-b/a+a/b=2a/b-2b/a当a=-3/2，b=2/3时原式=2×(-9/4)-2×(-4/9)=-9/2+8/9 =-65/18问你一下/是什么意思，结果是2a分之b-2b分之a吗？？？？/是除以2a/b是b分之2a