Question

racionalizando 2 sobre raiz de 2 mais 1

Answer 1

$\boxed{\frac{2}{ \sqrt{2}+1 }.\frac{ \sqrt{2}-1 }{ \sqrt{2} -1}=\frac{2 \sqrt{2}-2 }{2-1}=2 \sqrt{2}-2=2( \sqrt{2}-1) }$

$\boxed{\frac{2}{ \sqrt{5}+1 }.\frac{\sqrt{5}-1 }{\sqrt{5}-1 }=\frac{2 \sqrt{5}-2 }{5-1}=\frac{2 \sqrt{5}-2}{4}}$