ab(ab-2a+2)-2b(a²b-2ab+2a) 化简
a+b/2ab
2AB/A+B
(a-b)(a^2+ab+b) 化简
化简a^+ab除以a^+2ab+b^
a²-2ab+b²化简
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
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
化简 b²-a²/a²-ab÷(a+(2ab+b²/a))·(1/a+1/b)
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
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&