(1)原式=-1+1- 2 +1- 6 × 3 3 =1-2 2 .(2)a=2,b=-3,c=-1,∴b2-4ac=(-3)2-4×2×(-1)=17,∴x= 3± 17 2×2 ,∴x1= 3+ 17 4 ,x2= 3? 17 4 .