Question

Resolva: 
a) √5 x √7 = 
b) 15√6 : 3√2 = 

Answer 1

$a)\ \sqrt{5} \times \sqrt{7} = \sqrt{5 \times 7} = \sqrt{35}\\\\\\ b)\ \dfrac{15\sqrt{6}}{3\sqrt{2}} = \dfrac{15}{3}\times\dfrac{\sqrt{6}}{\sqrt{2}} = 5 \times \sqrt{\dfrac{6}{2}}=5\sqrt{3}$

Bons estudos!