[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]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
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x
[(5x+2y)(3x+2y)+(x+2y)(x-2y)]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
数学(x-y)^5*(y-x)^3*(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
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
(2X-3y)-(5x-y)