a)
[tex]16 \sqrt{3 } - 32 \sqrt{2} + 26 \sqrt{3} - 39 \sqrt{2} - 15 \sqrt{3} + 20 \sqrt{2} = \\ 42 \sqrt{3} - 15 \sqrt{3} - 71 \sqrt{2} + 20 \sqrt{2} = \\ 27 \sqrt{3} - 51 \sqrt{2} = 3(9 \sqrt{3 } - 17 \sqrt{2} )[/tex]
b)
[tex]12 \sqrt{3} - 9 \sqrt{6} - 15 \sqrt{3} - 20 \sqrt{6} + 6 \sqrt{3 } + 14 \sqrt{6} = \\ - 3 \sqrt{3 } + 6 \sqrt{3} - 29 \sqrt{6 } + 14 \sqrt{6} = \\ 3 \sqrt{3} - 15 \sqrt{6} = 3( \sqrt{3} - 5 \sqrt{6} )[/tex]
