(a+b)2(a-b)÷(a-b)2
化简:{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)]
(a+b分之2a-b - a-b分之b)÷ a+b分之a-2b
(a+b/b-a)+(2a/a-b)-(b-a/2b)等于多少
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
计算 (a²-2ab+b²-a+b)÷(a-b) (a+b)²÷(a-b)
计算[(a+b)^2-(a+b)]*(a+b)
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
先化简,再求值;[(2a-b/a+b)-(b/a-b)]÷{(a-2b/a+b)+[ab/(a-b)²]},其
a-b+2b²/a+b
a(a-2b)+2(a+b)(a-b)+(a+b)的平方 怎么算?
化简(2a-b/a+b-b/a-b)除以a-2b/a +b
计算:((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)