先化简,再求值:m/(m+3)-6/(m^2-9)/2/(m-3).6/(m^2-9)/2/(m-3)的意思是6/(m^2-9)去除以2/(m-3).
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![先化简,再求值:m/(m+3)-6/(m^2-9)/2/(m-3).6/(m^2-9)/2/(m-3)的意思是6/(m^2-9)去除以2/(m-3).](/uploads/image/z/1584398-38-8.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9Am%2F%28m%2B3%29-6%2F%28m%5E2-9%29%2F2%2F%28m-3%EF%BC%89.6%2F%28m%5E2-9%29%2F2%2F%28m-3%EF%BC%89%E7%9A%84%E6%84%8F%E6%80%9D%E6%98%AF6%2F%28m%5E2-9%29%E5%8E%BB%E9%99%A4%E4%BB%A52%2F%28m-3%EF%BC%89.)
先化简,再求值:m/(m+3)-6/(m^2-9)/2/(m-3).6/(m^2-9)/2/(m-3)的意思是6/(m^2-9)去除以2/(m-3).
先化简,再求值:m/(m+3)-6/(m^2-9)/2/(m-3).
6/(m^2-9)/2/(m-3)的意思是6/(m^2-9)去除以2/(m-3).
先化简,再求值:m/(m+3)-6/(m^2-9)/2/(m-3).6/(m^2-9)/2/(m-3)的意思是6/(m^2-9)去除以2/(m-3).
原式=m/(m+3)-6/(m+3)(m-3)/2/(m-3)
=m/(m+3)-3/(m+3)
=(m-3)/(m+3).
6/(m^2-9) =6/(m+3)(m-3)
6/(m^2-9)/2/(m-3)=6/2 *1/(m+3) =3/(m+3)
m/(m+3)-6/(m^2-9)/2/(m-3)
=m/(m+3)-3/(m+3)
=(m-3)/(m+3)
原式=m/(m+3)-6/(m^2-9)*(m-3)/2
=m/(m+3)-6/[(m+3)(m-3)]*(m-3)/2
=m/(m+3)-3/(m+3)=(m-3)/(m+3)
在带入m的值就可以求出来了
原式=m/(m+3)-[6/(m+3)(m-3)]*[(m-3)/2]
=m/(m+3)-3/m+3
=m-3/m+3
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