[(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x
【(x-y)^2+(x+y)(x-y)】除以 2x
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
y^2-x^2\5x^2-4yx除以x+y\5x-4y
[(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x)
[(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
已知2x-y除以x+y等于2,求代数式(4x-2y除以x+y)-(4x+4y除以2x-y)的值
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
1、x(x-y)(x+y)-x(x+y)^2
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,