Question

Efetue as operações:
$5 \sqrt{7} - 2 \sqrt{7}$
$8 \sqrt{2} + 13 \sqrt{2} - 5$
$2 \sqrt{6} - 2 \sqrt{5} + \sqrt{6}$
$\sqrt{2} + \sqrt{18}$

Answer 1

$I - 5 \sqrt{7} - 2 \sqrt{7}$
$3 \sqrt{7}$


$II - 8 \sqrt{2} + 13 \sqrt{2} - 5$
$16 \sqrt{2}$


$III - 2 \sqrt{6} - 2 \sqrt{5} + \sqrt{6}$
$3 \sqrt{6} - 2 \sqrt{5}$


$IV - \sqrt{2} + \sqrt{18}$
$\sqrt{2} + 3 \sqrt{2}$
$4 \sqrt{2}$