Question

Find the value √45× √20

Answer 1

$\huge\bigstar\sf\red{Answer:}$

$\sf{\sqrt45\times\sqrt20}$

$\sf{=\sqrt{9\times5}\times\sqrt{4\times5}}$

$\sf{=3\sqrt5\times2\sqrt5}$

$\sf{=6\times5}$

$\sf{=30}$

$\sf{Hence, \ the \ value \ of \ \sqrt45\times\sqrt20=30.}$

Answer 2

Answer:

$\sqrt{45} \times \sqrt{20}$

$\sqrt{45 \times 20}$

$\sqrt{900}$

$30$