Question

What is the perfect square factor of 80?

Answer 1

16

Explanation:

80 is divisible by 16, the answer to which is 5

16 is a perfect square, since it is `4^2`

`sqrt80`

=`sqrt(16*5)`

=`4sqrt5`

Answer 2

`80` has a few factors that are perfect squares, namely `1, 4` and `16`. For simplifying a radical we pick the biggest: `sqrt{80}=sqrt{16 cdot 5} = 4 sqrt{5}`.

Explanation: