Question

Rationalizati va rog fracti: 4/5+2radical din 6, unde " / " - linia de fractie

Answer 1

$\frac{4}{5+2 \sqrt{6}}$ = $\frac{ 4(5- 2\sqrt{6} )}{ 5^{2} - 2^{2}( \sqrt{6} ) ^{2} }$=$\frac{20- 8\sqrt{6} }{25-24}$= 20-$8\sqrt{6}$