ab/(a+b)^2与b/a^2-b^2 x/xy-y^2与y/x^2-xy 通分
通分(1)6c/a²b与c/3ab² (2)x - y/2x+3y与xy/(x+y)²
通分:3y分之x与2y平方分之3x,a平方b分之6c与3ab平方分之c,2x+2y分之x-y与(x+y)平方分之xy 要
分式通分 分式ab/xy^2,bc/x(a-b),a/y(b-a)的最简公分母
分式的通分和约分,1、9a+6ab+b^2/3a+62、x^2-36/2x+12这2个是通分1、x-y/2x+2y与xy
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy
已知|x+y-1|与|x+2|互为相反数,且a、b互为倒数,求xy+ab的值
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分
已知A=2x²+3xy-2x-1,B=-x²+xy-1,3A+6B的值与x无关,求y
分解因式:ab(x^2-y^2)-(a^2-b^2)(xy+1)-(a^2+b^2)(x+y)
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B