tolong banget bantu saya.

13.
[tex] \sqrt{ {3}^{5} } [/tex]
14.
[tex]4 \times \frac{1}{ \sqrt{3} + 1 } = \frac{4}{ \sqrt{3} + 1} \times \frac{ \sqrt{3} - 1 }{ \sqrt{3} - 1} = \frac{4 \sqrt{3} - 4 }{3 - 1} = 2 \sqrt{3} - 2 = 2( \sqrt{3} - 1)[/tex]