Algebra Question

[basty]

How to find

$\sqrt{(a+b) + 2 \sqrt{ab}} = \sqrt{a} + \sqrt{b}$

????

 

[Chestermiller]

How to find

$\sqrt{(a+b) + 2 \sqrt{ab}} = \sqrt{a} + \sqrt{b}$

????

Square both sides.