Can you find the square root of a negative number

No, and therefore, the answer to a negative square root will be "i" which stands for "imaginary" (a group of numbers).

Example:

Hope it helped,

BioTeacher101

Remark

Only if you define it into existence. The square root of a negative number is does not exist in the real world.

√(-1) is defined to be i

That is what is termed a complex number.  

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.