原式=[
(m+1)(m−1)
(m−1)2+[m
m(m−1)]÷
m+2/m]
=([m+1/m−1]+[1/m−1])÷[m+2/m]
=[m+2/m−1]•[m/m+2]
=[m/m−1],
当m=-2×
3
2=1-
3时,
原式=
1−
3
−
3+1−1=1-
3
3.
原式=[
(m+1)(m−1)
(m−1)2+[m
m(m−1)]÷
m+2/m]
=([m+1/m−1]+[1/m−1])÷[m+2/m]
=[m+2/m−1]•[m/m+2]
=[m/m−1],
当m=-2×
3
2=1-
3时,
原式=
1−
3
−
3+1−1=1-
3
3.