kak tolong jawab dan beserta caranya

[tex]14. \\ 3 \sqrt{128} - 2 \sqrt{48} + 2 \sqrt{162} - 3 \sqrt{192} \\ = 3.8 \sqrt{2} - 2.4 \sqrt{3} + 2.9 \sqrt{2} - 3.8 \sqrt{3} \\ = 24 \sqrt{2} + 18 \sqrt{2} - 8 \sqrt{3} - 24 \sqrt{3} \\ = 42 \sqrt{2} - 32 \sqrt{3} ....c[/tex]
[tex] \\ 15. \\ \frac{14}{3 - \sqrt{2} } \\ = \frac{14}{3 - \sqrt{2} } \times \frac{3 + \sqrt{2} }{3 + \sqrt{2} } \\ = \frac{14(3 + \sqrt{2}) }{9 - 2} \\ = \frac{14(3 + \sqrt{2}) }{7} \\ = 2(3 + \sqrt{2} ) \\ = 6 + 2 \sqrt{2} ....a[/tex]