宸茬煡X虏-Y虏=8,X-Y=2,姹俋虏+Y虏镄勫

宸茬煡X虏-Y虏=8,X-Y=2,姹俋虏+Y虏镄勫 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 宸茬煡{(x-2)虏-(x+y)虏+y(2x-y)}梅(-2y)=2,姹 宸茬煡x虏+y虏+2x-6y+10=0,姹倄^ yx²+y²+2x-6y+10=0,求x^ y 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 12y(x-y)^2-8(x-y)^3=? （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*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? 已知x+y/y=11/8,求x-y/x+2y的值. y+y'-2y=2x 微分方程y - 2y' + y = x (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian