Question

Am nevoie de exercitile 8 și 9 pana mâine!!
Dau coroana

Answer 1

$a)2 \sqrt{3} \times 4 \sqrt{6} = 8 \sqrt{18} = 2 \sqrt{2}$

$b)2 \sqrt{3} \times ( - \sqrt{2}) = - 2 \sqrt{6}$

$c) \frac{ - 2 \sqrt{2} }{3} \times \frac{ \sqrt{2} }{4} = - \frac{ \sqrt{2} }{3} \times \frac{ \sqrt{2} }{2} = - \frac{2}{6} = - \frac{1}{3}$

$d)( - 2 \sqrt{3}) \times ( - \frac{ \sqrt{3} }{2}) = 2 \sqrt{3} \times \frac{ \sqrt{3} }{2} = 3$

$e) - 4 \sqrt{3} \times \sqrt{7} = - 4 \sqrt{2 \times 7} = - 4 \sqrt{21}$

$f)6 \sqrt{5} \times ( - \frac{ \sqrt{5} }{30} )= 6 \sqrt{5} + \frac{ \sqrt{5} }{30} = \frac{181 \sqrt{5} }{30}$