(a²-b²)/ab-(ab-b²)/(ab-a²)+a/b
=a/b-b/a-b/a+a/b
=2a/b-2b/a
當(dāng)a=-3/2,b=2/3時
原式=2×(-9/4)-2×(-4/9)
=-9/2+8/9
=-65/18你把它寫清楚一點(diǎn)(a²-b²)/ab-(ab-b²)/(ab-a²)+a/b=a/b-b/a-b/a+a/b=2a/b-2b/a當(dāng)a=-3/2，b=2/3時原式=2×(-9/4)-2×(-4/9)=-9/2+8/9 =-65/18問你一下/是什么意思，結(jié)果是2a分之b-2b分之a(chǎn)嗎？？？？/是除以2a/b是b分之2a