[2(a+b)^5-3(a+b)^4+(-a-b)^3]/[2(a+b)^3]
=[2(a+b)^5-3(a+b)^4-(a+b)^3]/[2(a+b)^3]
=[2(a+b)^2-3(a+b)-1]/2
=(a+b)^2-(3/2)(a+b)-1/2
=a^2+2ab+b^2-(3/2)a-(3/2)b-1/2.
(a+b)^2-1.5(a+b)-0.5
没别的条件了吗
a^2+b^2+2ab-3a/2-3b/2-1/2
约分就行了
答案:a^2+b^2+2ab-1.5a-1.5b-0.5