Question

me ajudem por favooor!!​

Answer 1

Resposta:

a) - $2\sqrt{2}$ +  $\sqrt{2}$ + $2\sqrt{5}$ - $4\sqrt{5}$ - $5\sqrt{5}$ = - $\sqrt{2}$ -  $7\sqrt{5}$

b) 3 . 2 = 6

c)  $2\sqrt{6}$ :  $\sqrt{3}$ =  $2\sqrt{6}$ .  $\sqrt{3}$ / $\sqrt{3}$ . $\sqrt{3}$     (*) Racionalizando

= $2\sqrt{18}$ / 3 => $6\sqrt{2}$ / 3 => $2\sqrt{2}$              (**) Simplificando e resolvendo