{[(2A-2B)/(a^2-2AB+B^2)]+B/(A^2-B^2)}÷(3b+2a)/(a+b)
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
化简:{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)]
(a-b)(a^2+ab+b) 化简
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
a+b/2ab
2AB/A+B
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
先化简,再求值;[(2a-b/a b)-(b/a-b)]÷{(a-2b/a b) [ab/(a-b)2]},其中b/a=
a-b+2b²/a+b
(a^2+b^2/a^2-b^2-a-b/a+b)/2ab/(a-b)(a+b)