宸茬煡{(x-2)虏-(x+y)虏+y(2x-y)}梅(-2y)=2,姹

[(3x+y)虏-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) 是[(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) 宸茬煡{(x-2)虏-(x+y)虏+y(2x-y)}梅(-2y)=2,姹 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+2x-6y+10=0,姹倄^ yx²+y²+2x-6y+10=0,求x^ y (y-x)虏-(x+y)(x-y)锲犲纺鍒呜В x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 [(x-y)^2-(x+2y)(x-2y)]/y 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 锛坸+y)虏-16(x-y)虏 x^2(x-y)+(y-x) x(x-y)2-(y-x)3 【(x-y)^2+(x+y)(x-y)】除以 2x [(x-y)²+(x+y)(x-y)]除以2x 已知x=根号3+根号2,y=根号3-根号2,求（x²+xy+y²）/（x+y）-(x+y)宸茬煡x=镙瑰佛3+镙瑰佛2,y=镙瑰佛3-镙瑰佛2,姹倄虏+xy+y虏/x+y-(x+y)