1.把分式[x^2-(y-z)^2]/[(x+y)^2-z^2]约分得_________.2.m为何值时,关于x的方程2/(x-2)+mx/(x^2-4)=3/(x-2)会产生增根?3.已知(2x+3)/[x*(x-1)*(x+2)]=A/x+B/(x-1)+C/(x+2) (A.B.C都为常数),求A.B.C的值分别是多少?4.已知a^2-ab-2b^

把下列各式化为最简分式：（x^2-(y-z)^2)/((x+y)-z^2) 分式约分:(y+z-x)/{x^2-(y+z)^2} 把分式1/x,2/3y,3/z通分后,结果是（ ）. 分式(-3x^3y÷3z^2)^2 x^2-(y-z)^2/(x+y)^2-z^2 分式约分 已知x/y+z=y/x+z=z/x+y,分式(x+2y+3z)/(2x+5y-2c)有意义时的值 化简:分式加减化简:(2x-y-z)/(x-y)(x-z)+(2y-z-x)/(y-z)(y-x)+(2z-y-x)/(z-y)(z-x) 分式加减的几道题目求速度1 .(x+y)²/（x-z)(y-z) - (y+z)²/（x-z)(y-z) = 2.2x+3y/x-y+2y/y-x-3y/x-y= 已知x/4=y/3=z/2,则分式(x+y+z)/z的值为_____ 已知x/4=y/3=z/2则分式x+y+z/z的值为 一道数学题：若x:y:z=2:3:4,求分式x-y-z /2x+3y的值若x:y:z=2:3:4,求分式x-y-z /2x+3y的值 已知x/3=y/4=z/5,求分式x+y/x-2y+3z的值 化简:(2x-y-z)/(x-y)(x-z)+(2y-z-x)/(y-z)(y-x)+(2z-x-y)/(z-x)(z-y)化简:(2x-y-z)/(x-y)(x-z)+(2y-z-x)/(y-z)(y-x)+(2z-x-y)/(z-x)(z-y)我知道把分母化成一样的、但是之后怎么算? 分式的通分 x/a(x+2),y/b(x-2),z/(x²-4） 把分式xy-y/x-2x+1约分 计算x∧2-(y-z)∧2/(x+y)∧2-z∧2分式约分, X/3=Y/2=Z/5,则分式xy+xz+yz/x^2+y^2+z^2= 已知(x+y)/z=(x+z)/y=(y+z)/x=2,且xyz≠0,则分式(x+y)(x+z)(y+z)/xyz的值为?