这道题真么做X Y 6 10 Y X如果（X+Y) (Y+X) =(X+6) ,且（X-Y)X+6(X-Y)=(X-Y)

{(x,y) |x|+|y| x>y?x:y 如果分式3x-6y/x+y=0,那么x,y 应满足 A、x=2y B、x≠-y C、x=2y且x≠-y D、x=2y且y 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 (x-y)x^6+(y-x)y^6因式分解