# Question 051a2

Mar 31, 2016

A square root is the opposite of a square (exponent of 2).

#### Explanation:

For example:

sqrt121 = 11*11;11^2#

Notice that in the answer (11*11) both numbers are the same.

$\sqrt{-} 1$ is a bit more complicated, with the answer being $i$ as no two identical numbers can be multiplied together to get -1.

Hope this helps.