Question

Plz explain me 5 root 45*root 20

Answer 1

$\sqrt{45} \times \sqrt{20}$
$\sqrt{ 45 \times 20}$
$\sqrt{900}$
$\sqrt{ {30}^{2} }$
$30$

Answer 2

since both the powers of roots are same they can be multiplied... therefore u get the answer as root 900 the square root of 900 is 3*2*5

so 5*3*2*5=150

hope this helps