Question

What is the simplest form of the expression square root 80

Answer 1

\( \color{Black}{\Rightarrow \sqrt{80} = \sqrt{2 \times 2 \times 2 \times 2 \times 2 \times 5} }\)

Answer 2

\[\sqrt{80}=\sqrt{2\times2\times2\times2\times5}\]
If a factor is inside twice, you can take it out. So here, you can take out two twos.
so you get \[2 \times 2 \times \sqrt{5} = 4\sqrt{5}\]
@SirIsaacNewton , you have one too many 2 factors.