Question

2+5
$\frac{2}{1 + \sqrt{5 = } }$
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Answer 1

Respuesta:

$=-\frac{1-\sqrt{5}}{2}$

Explicación paso a paso:

$\frac{2}{1+\sqrt{5}}\\\\\\=\frac{2\left(1-\sqrt{5}\right)}{\left(1+\sqrt{5}\right)\left(1-\sqrt{5}\right)}\\\\\\=\frac{2\left(1-\sqrt{5}\right)}{-4}\\\\\\=-\frac{2\left(1-\sqrt{5}\right)}{4}\\\\\\=-\frac{1-\sqrt{5}}{2}$