填空(x+y)^2+( )=(x-y)^2

填空：x-y/x+y=( )/x^2-y^2 x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空 (x-y)( )+y^2-x^2填空 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x+y-z=x+( )=x-( )填空x+y-z=x+()=x-() 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/( ) 填空：2x-y-（ ）=—x+2 填空.(X-Y)的平方+( )=(x+y)的平方 (x-y)(x+y)(xˇ2+yˇ2)=__________1道填空题.等于白送 填空,√x^4y²(x²+2xy+y²)=x＞0，y＞0 填空：1.（1）2m（y-x）^2=（ )(x-y)^2填空：1.（1）2m（y-x）^2=（ )(x-y)^2（2）-2m(y-x)^3=( )(x-y)^3( 3 ) (x+y)(y-x)=-(x+y)( )( 4 ) -m(y-x^2)=m( ) 填空(1/3x+?)(?+2y)=4Y^2-1/9x^2 填空：x^2-2xy+y^2=（______）（x-y） 填空：（x-y-z）（_________）=x^2-（y+z）^2 z=2(x-y)-x平方-y平方的驻点坐标!填空