bentuk sederhana dari

14/(3 + √2)
= 14/(3 + √2)  x (3 - √2)/(3 - √2)
= 14(3 - √2)/(9 - 2)
= 14(3 - √2)/7
= 2(3 - √2)
= 6 - 2 √2

[tex]$\begin{align} \frac{14}{3 + \sqrt{2} } &= \frac{14}{3 + \sqrt{2} } \ . \ \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} \\\\ \boxed{\bold{Jawabannya \ D.}}\end{align}[/tex]