Question

√ 8 + √32 + √72- √50 reduzir os radicais e efetuar

Answer 1

$\sqrt{8} = 2.82$
$\sqrt{72} = 8.48$

$\sqrt{32} = 5.65$
$\sqrt{50} = 7.07$
2.82 + 5.65 + 8.48 - 7.07 = 9,88

Answer 2

$\sqrt{8} + \sqrt{32} + \sqrt{72} - \sqrt{50} = \\ \\ \sqrt{2^2.2} + \sqrt{2^2.2^2.2} + \sqrt{2.2^2.3^2} - \sqrt{2.5^2} = \\ \\ 2 \sqrt{2} +2.2 \sqrt{2} +2.3 \sqrt{3} -5 \sqrt{2} = \\ \\ 2 \sqrt{2} +4 \sqrt{2} +6 \sqrt{3} -5 \sqrt{2} = \\ \\ (2+4+6-5) \sqrt{2} = \\ \\ (12-5) \sqrt{2} = \\ \\ 7 \sqrt{2}$