Question

the positive square root of 80 is ?

Answer 1

4 sqrt 5

Answer 2

\[
\begin{split}
\sqrt{80} &= \sqrt{4 * 20}\\
&= \sqrt{4 * 4 * 5}\\
&= \sqrt{4} *\sqrt{4} *\sqrt{5}\\
&= 2 * 2 * \sqrt{5}\\
&= 4 \sqrt{5}\\
\end{split}
\]

Answer 3

i would strongly advise - if not asked to - do not change to decimal.