Find the square root of number by using the method of prime factorisation:

Resolving into prime factors:

$9216=2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 3 \times 3$

$\therefore \sqrt{9216}=2 \times 2 \times 2 \times 2 \times 2 \times 3=96$