Question

State with reasons whether √20*√45 is a surd or not?

Answer 1

Answer:

$\sqrt{20} \times \sqrt{45} \\ = \sqrt{20 \times 45} \\ = \sqrt{900} = 30 \\ \because \: squre \: root \: of \: 900 \: is \: 30 \\ \therefore \: \sqrt{20} \times \sqrt{45} \: is \: not \: a \: surd.$