a+b/a-a/a-b+b^2/a^2-ab...
(a-b)(a^2+ab+b) 化简
a+b/2ab
2AB/A+B
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
(a^2+b^2/a^2-b^2-a-b/a+b)/2ab/(a-b)(a+b)
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
因式分解-ab(a-b)^2+a(b-a)^2
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+
已知a+2b=0,求a*a+2ab-b*b/2a*a+ab+b*b
若a/b=2,求分式a*a+ab-b*b/a*a-2ab+2b*b