Question

2.d) 2 √√√5supra8 ori √2 supra 5; f)3√1supra2 ori (-√√2supra 5) ori (4√15);
3. a) √35  / √5; b) (-√24) / √6; d) (2√7) / (-3√2);

Answer 1

3a)√35/√5 rationalizam=√35·√5/√5²=√175/5=5√7/5=√7
b) -√24/√6=-√24·√6/√6²=-√144/4=-12/6=-2
d)2√7/-3√2=-2√7·√2/9·2=-2√14/18=-√14/9

Answer 2

$\frac{2 \sqrt{5} }{8}* \frac{ \sqrt{2} }{5} = \frac{2 \sqrt{10} }{40} = \frac{ \sqrt{10} }{20}$

$\frac{3 \sqrt{1} }{2} * \frac{- \sqrt{2} }{5} * 4 \sqrt{15} = \frac{-3 \sqrt{2} }{10} *4 \sqrt{15} = \frac{-12 \sqrt{30} }{10} = \frac{-6 \sqrt{30} }{5}$