Question

$\sqrt{18a^2}$ +$\sqrt{50a^2}$ - $\sqrt{2a^2}$

Answer 1

√18a² = √2 . 3².a²  =  3a√2

√50a² = √2.5².a²  =  5a√2

√2a² =  a√2

3a√2 + 5a√2 - a√2 =   7a√2   resposta.