解:∵(m+1/m)=3
∴(m+1/m)^2=9
即m^2+1/m^2+4m^2=9
m^2 =四分之九
m=二分之三
∴(m-1/m)平方= 0
解:因为(m+1/m)=3
所以m+1/m)^2=9
即m^2+1/m^2=7
所以(m-1/m)^2=m^2+1/m^2-2=7-2=5
(m+1/m)=3既有
3m=m+1得到m=0.5
那么(m-1/m)=-1
(m-1/m)平方=1
解:m+1/m=3
(m+1/m)²=3²
m²+2+1m²=9
m²-2+1/m²=5
(m-1/m)²=5
m-1/m=±√5
(m+1/m)=3
(m+1/m)^2=9
m^2+1/m^2+2=9
m^2+1/M^2-2=5
(m-1/m)^2=5