What's the square root of - 121

The answer is 11 i

Explanation:

The square root needs to be a number that can be multiplied by itself and equal the original number.

In this case, the number is 11, 11*11 = 121

However, you are looking for the square root of a negative number, due to this you would add i to the answer,

i = imaginary number, or -

(Depending on your grade / teacher however, you can put "no solution"