[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
【(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
1、x(x-y)(x+y)-x(x+y)^2
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
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
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
如果2x-y=8,求代数式[(x^2+y^2)-(x-y)^2+2y(x-y)]除以(4y)的值.
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
[(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x)