[(2x—y)(2x+y)—y(y—6x)]除以2x=多少
[(2x—y)(2x+y)—y(y—6x)]除以2x=多少
【(x-y)^2+(x+y)(x-y)】除以 2x
解方程组X+Y除以2+X—Y除以3=6和4(X+Y)—5(X—Y)=2
(x^2-y^2)2除以(x+y)^2再除以(x-y)等于多少
{(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=
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
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
[(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x)
x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=