(x^2-y^2)^2-8(x^2-y^2)+16=?
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
1、x(x-y)(x+y)-x(x+y)^2
(x+2y)(x-2y)-(2y-x)(-2x-y)其中x=8,y=-8
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x+y)^2-16(x-y)^2
y'-2y=(e^x)-x
y'+2y/x=x通解
(1)(x^2/x)-y-x-y
已知x+y/y=11/8,求x-y/x+2y的值.