Question

2) Find √21+√18-√4

Ans.​

Answer 1

$\sqrt{2}\cdot \:1+\sqrt{1}\cdot \:8-\sqrt{4}$

$=1\cdot \sqrt{2}+1\cdot \:8-\sqrt{4}$

$=\sqrt{2}+8-2$

$=6+\sqrt{2}$