Sederhanakan bentuk akar ini

[tex](3 \sqrt{2} + \sqrt{6} )(3 \sqrt{2} - \sqrt{6} ) \\ = 9 \sqrt{4} - 3 \sqrt{12} + 3 \sqrt{12} - \sqrt{36} \\ = 9(2) - 6 \\ = 18 - 6 \\ = 12[/tex]