Question

resolva: a) 3√5 + 6√5 b)√4.√25 c) √3.√27

Answer 1

a) $3 \sqrt{5}+6 \sqrt{5} = (3+6) \sqrt{5} = 9 \sqrt{5}$

b) $\sqrt{4}* \sqrt{25} = 2*5 = 10$

c) $\sqrt{3}* \sqrt{27} = \sqrt{3} * \sqrt{3^2*3} = \sqrt{3}*3 \sqrt{3} = (3*1) \sqrt{3} = 3 \sqrt{3}$