(x-y)^7除以(y-x)^3除以(y-x)^2=_____
【(x-y)^2+(x+y)(x-y)】除以 2x
函数y=2x+3除以(x-1)(x
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
化简:【(x-y)的2次方+(x+y)(x-y)】除以2x,其中x=3,y=1.5
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(2x+3y)除以(5x-3y)=3/5求x比y
已知x除以2=y除以3=z除以4,且x≠0,求x+y+z除以x-2y+3z的值,
已知x除以2=y除以3=z除以-7≠0
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知x-y除以x+y=3,求代数式x+y分之2(x-y)-3(x-y)分之x+y的值.
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=