化简(a+b/a^2b-ab^2-4/a^2-b^2)÷a^2-2ab+b^2/a^2-ab^2
a+b/2ab
2AB/A+B
(a-b)(a^2+ab+b) 化简
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
a-b/a^2+ab / ab-a^2/a^2b^2-b^4
化简 a+2根号ab+b/a-b-(根号a/a+根号ab-根号b/b-根号ab)÷根号a/b+根号ab
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
已知a^2+ab+b^2|ab(a+b),求证(a-b)^3>3ab
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快