2-3㎡+1=03m²=2+13m²=3m²=1m=1或m=-1
解:-3m²+3=0两边同时除以-3,得 m²-1=0(m+1)(m-1)=0m₁=-1 m₂=1
2-3㎡+1=03-3㎡=01=㎡m=1或者m=-1
m的平方=1;M=+1或者M=-1