9(x+y)^2-12(x^2-y^2)+4(x-y)^2昂.帮莪

9(x-y)-12(y-x)^2 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 4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解, 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) (x-y)^2+12(x-y)+36 (x+y)^2+6(x+y)+9 (x+y)^2-9(x+y)+18 因式分解x(x+y)(x-y)-x(x+y)^2 3y=2x y/3=x/2 12/x=9/y y/x=?y/x=?x/y=? 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 [(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 因式分解(x+y)^2y^2-12(x+y)y^2+36y^2-y^4 x^2(x-y)+(y-x) x(x-y)2-(y-x)3 【(x-y)^2+(x+y)(x-y)】除以 2x