3a^2-(4a^2b-2ab^2-b^2)-(2ab^2+3a^2-3b^2)+3a^2b
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
已知a^2+ab+b^2|ab(a+b),求证(a-b)^3>3ab
已知3a*a+ab-2b*b=0(a不等于0,b不等于0),求a/b-b/a-(a*a+b*b)/ab的值.
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
a+b/2ab
2AB/A+B
-2ab(3a^2-2ab-4b^2) (2b-a)b-(2a-b)a
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
-ab(a-b)^2+a(b-a)^2-a(a-b)^3
[(a^2-b^2)/b]^2/(a^2+ab)^3*(ab/b-a)^2
a^3+a^2b+ab^2+b^3 a+b=3 ab=-2