Question

Rationalizand fractia 11 supra
2radical din 5 -3. Se obtine?
Va rog raspundeti

Answer 1

$\frac{11}{2\sqrt5-3}=\frac{(2\sqrt5+3)\cdot11}{(2\sqrt5-3)(2\sqrt5+3)}=\frac{11\cdot(2\sqrt5+3)}{4\cdot5-9}=\frac{11\cdot\,(2\sqrt5+3)}{11}=2\sqrt5+3$