Question

Radical din 2+ radical din 72

Answer 1

$\sqrt{2}+\sqrt{72} =$

• Scot factorii de sub radicali.

$= \sqrt{2}+\sqrt{36\cdot 2}$

$= \sqrt{2}+\sqrt{6^2\cdot 2}$

$= \sqrt{2}+\sqrt{6^2}\cdot \sqrt{2}$

$=\sqrt{2}+6\sqrt{2}$

$= \boxed{7\sqrt{2}}$