- $ \\\left\\\{ \\\begin{gathered} a = 3 \\\hfill \\\\\\ b = - 2 \\\hfill \\\\\\ \\\end{gathered} \\\right..$
- $ \\\left\\\{ \\\begin{gathered} a = 3 \\\hfill \\\\\\ b = 2 \\\hfill \\\\\\ \\\end{gathered} \\\right..$
- $ \\\left\\\{ \\\begin{gathered} a = 2 \\\hfill \\\\\\ b = 3 \\\hfill \\\\\\ \\\end{gathered} \\\right..$
- $ \\\left\\\{ \\\begin{gathered} a = 2 \\\hfill \\\\\\ b = - 3 \\\hfill \\\\\\ \\\end{gathered} \\\right..$