Question

$\sqrt{243}$

Answer 1

$\sqrt{243}$ = $\sqrt{ 3^{5} }$ = $3^{2}$$\sqrt{3}$ = 
= 9$\sqrt{3}$

Answer 2

$\it \sqrt{243} =\sqrt{9\cdot 27} =\sqrt{9\cdot9\cdot3} = 3\cdot3\sqrt3 =9\sqrt3$