2(3x-1)²=9/2 两边同时除以2得(3x-1)²=9/43x-1=±3/23x=1±(3/2)x=[1±(3/2)]/3x1=5/6，x2=-1/6
2（3x-1）²=9／2（3x-1）²=9／43x-1=±3/23x-1=3/2或3x-1=-3/2∴x1=5/6, x2=-1/6
