Question

Divide 12root15 by 4root3

Answer 1

12root15 / 4root3
12 and 4 cancel each other
so its 3root15 / root3
root15 and root3 cancel each other
so the answer is
3root5

Answer 2

$12\sqrt{15}  /  4\sqrt{3}$

$12 \sqrt{3} \sqrt{5}    /    4\sqrt{3}$
$3 \sqrt{5}$