(2)由(1)知,l1的方程为y=3x-3,
则l1与l2的交点坐标为(1/6 ",-" 5/2).
因为l1与x轴的交点为(1,0),l2与x轴的交点为("-" 22/3 "," 0),
所以S=1/2×|"-" 22/3 "-" 1|·|"-" 5/2|=125/12.