Question

racionalize a fraçao √2/√2+1

Answer 1

$\mathtt{\dfrac{\sqrt{2} }{(\sqrt{2}+ 1)}.\dfrac{( \sqrt{2} - 1)}{( \sqrt{2} - 1)}} \\\mathtt{ \dfrac{ \sqrt{2}( \sqrt{2} + 1)}{2 - 1} = 2 + \sqrt{2} }$