You can square root a negative number with an imaginary number "i".

The statement "you can square root a negative number with an imaginary number i" is true because in the complex number system, the square root of a negative number involves the imaginary unit i. The imaginary unit i is defined as the square root of -1. When a negative number is square rooted, it becomes a complex number with a real part and an imaginary part. Thus, the square root of a negative number can indeed be expressed using an imaginary number i.