x^2+y^2+17除以4=4x+y,x+y+?
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
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-y)^2+(x+y)(x-y)】除以 2x
y^2-x^2\5x^2-4yx除以x+y\5x-4y
[(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x
如果2x-y=8,求代数式[(x^2+y^2)-(x-y)^2+2y(x-y)]除以(4y)的值.
解方程组 2x+y=4x-y-1除以2=10+6x+2y除以4.
已知A除以x²+4xy+4y²分之x²-y²=x+2y分之x+2y,当x=2,y