Question

alguem me ajuda
urgente​

Answer 1

Resposta:

e) $\sqrt{5} + 5$     |||     f)$7\sqrt{2}$

Explicação passo-a-passo:

e)

$\sqrt{5}.(1+\sqrt{5}) = \\\\(1\sqrt{5}) + (\sqrt{5} . \sqrt{5}) = \\\\\sqrt{5} + (\sqrt{5})^{2} = \\ \\\sqrt{5} + 5$

f)

$(3\sqrt{2} - 2).(\sqrt{2} + 3) = \\\\(3\sqrt{2}.\sqrt{2})+(3\sqrt{2}.3) + (-2.\sqrt{2})+(-2.3)=\\(3\sqrt{2}^{2}) + 9\sqrt{2}\ - 2\sqrt{2} - 6 = \\(3.2) + 7\sqrt{2} - 6 =\\6 + 7\sqrt{2} - 6 =\\\\7\sqrt{2}$

Espero ter ajudado