Question

preciso dos cálculos​

Answer 1

Resposta:

Explicação passo a passo:

a)

$2\sqrt{2}+5\sqrt{2} -3\sqrt{2} = (2+5-3)\sqrt{2} = 4\sqrt{2}$

b)

$\sqrt{5+\sqrt{4} } = \sqrt{\sqrt{4+5^2}} = \sqrt[4]{4+25} = \sqrt[4]{29}$

c)

$\sqrt{21+\sqrt{13+\sqrt{7+\sqrt{4} } } } =\\ \sqrt{21+\sqrt{13+\sqrt{7+2}}} =\\ \sqrt{21+\sqrt[4]{13^2+7+2 } } } =\\\sqrt[6]{21^2+13^2+7+2}\\ \sqrt[6]{441+169+7+2} \\\sqrt[6]{619}$