Question

06. A soma dos radicais: √2 + √50 – √98 + √18 é?

(a) 2√2.
(b) 3√3.
(c) 4√5.
(d) 6√2.
(e) 7√6.

Answer 1

Oie, Td Bom?!

■ Resposta: Opção A.

$= \sqrt{2} + \sqrt{50} - \sqrt{98} + \sqrt{18}$

$= \sqrt{2} + 5 \sqrt{2} - 7 \sqrt{2} + 3 \sqrt{2}$

$= 1 \sqrt{2} + 5 \sqrt{2} - 7 \sqrt{2} + 3 \sqrt{2}$

$= (1 + 5 - 7 + 3) \sqrt{2}$

$= 2 \sqrt{2}$

Att. Makaveli1996