x^2-y^2/x^2+2xy+y^2-x+y/x-y,其中x=1,y=-3带数求值!^-^下列运算正确的是 ( )A.a/a-b-b/b-a=1 B.m/a-n/b=m-n/a-bC.b/a-b+1/a=1/a D.2/a-b-a+b/a^2-b^2=1/a-b
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![x^2-y^2/x^2+2xy+y^2-x+y/x-y,其中x=1,y=-3带数求值!^-^下列运算正确的是 ( )A.a/a-b-b/b-a=1 B.m/a-n/b=m-n/a-bC.b/a-b+1/a=1/a D.2/a-b-a+b/a^2-b^2=1/a-b](/uploads/image/z/3024075-3-5.jpg?t=x%5E2-y%5E2%2Fx%5E2%2B2xy%2By%5E2-x%2By%2Fx-y%2C%E5%85%B6%E4%B8%ADx%3D1%2Cy%3D-3%E5%B8%A6%E6%95%B0%E6%B1%82%E5%80%BC%21%5E-%5E%E4%B8%8B%E5%88%97%E8%BF%90%E7%AE%97%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AF+%EF%BC%88+%EF%BC%89A.a%2Fa-b-b%2Fb-a%3D1+B.m%2Fa-n%2Fb%3Dm-n%2Fa-bC.b%2Fa-b%2B1%2Fa%3D1%2Fa+D.2%2Fa-b-a%2Bb%2Fa%5E2-b%5E2%3D1%2Fa-b)
x^2-y^2/x^2+2xy+y^2-x+y/x-y,其中x=1,y=-3带数求值!^-^下列运算正确的是 ( )A.a/a-b-b/b-a=1 B.m/a-n/b=m-n/a-bC.b/a-b+1/a=1/a D.2/a-b-a+b/a^2-b^2=1/a-b
x^2-y^2/x^2+2xy+y^2-x+y/x-y,其中x=1,y=-3
带数求值!^-^
下列运算正确的是 ( )
A.a/a-b-b/b-a=1 B.m/a-n/b=m-n/a-b
C.b/a-b+1/a=1/a D.2/a-b-a+b/a^2-b^2=1/a-b
x^2-y^2/x^2+2xy+y^2-x+y/x-y,其中x=1,y=-3带数求值!^-^下列运算正确的是 ( )A.a/a-b-b/b-a=1 B.m/a-n/b=m-n/a-bC.b/a-b+1/a=1/a D.2/a-b-a+b/a^2-b^2=1/a-b
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