(x-y)( )+y^2-x^2填空

(x-y)( )+y^2-x^2填空 填空：x-y/x+y=( )/x^2-y^2 填空(x+y)^2+( )=(x-y)^2 (x-y-z)*( )=x^2-(y+z)^2 填空 填空 (x^2-y^2)(x+y)^2=(x-y)(____)^3 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 填空-5/7x=( )/7x=5/( ) x-y/x+y=X^2-y^2/( )填空-5/7x=( )/7x=5/( ) x-y/x+y=X^2-y^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 x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 填空：2x-y-（ ）=—x+2 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 x^2(x-y)+(y-x) x(x-y)2-(y-x)3 【(x-y)^2+(x+y)(x-y)】除以 2x