(3 akar 3 tambah akar 2)(2akar 3 kurangi 3 akar 2)

[tex](3 \sqrt{3} + \sqrt{2} )(2 \sqrt{3} - 3 \sqrt{2} ) \\ = 18 - 9 \sqrt{6} + 2 \sqrt{6} - 6 \\ = 12 - 7 \sqrt{6} [/tex]