Question

1. $sqrt{9x^3}$

Explanation:

Step1: Split radical into factors

$\sqrt{9x^3} = \sqrt{9 \cdot x^2 \cdot x}$

Step2: Simplify perfect squares

$\sqrt{9} \cdot \sqrt{x^2} \cdot \sqrt{x} = 3x\sqrt{x}$

Answer:

$3x\sqrt{x}$