what is the square root of -1220

Thanks Rom,

If you are not at university then Rom's answer probably doesn't make any sense. (He is right though)

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So I will tell you that there are no solutions to this because you cannot find the square root of a negative number.

A negative x a negative = a positive

a positive x a positive = a positive

No (real) number times by itself = a negative : so there are no solutions.

The square root of -1220 isn't defined on the real numbers.

On the complex numbers it is given as

$$\sqrt{-1220}=\imath \sqrt{1220}=2\imath \sqrt{305}$$

where

 $$\imath = \sqrt{-1}$$