Question

Simplifique o radical e efetue a operação : 2√7 + 1√28=?

Answer 1

$2 \sqrt{7} +2 \sqrt{28} = \\ \\ 2 \sqrt{7} +2 \sqrt{2^2.7} = \\ \\ 2 \sqrt{7} +2 \sqrt{7} =4 \sqrt{7}$