Express 3+square root -4 as a complex number

  3 +2i

Step-by-step explanation:

The number in complex number form is

Let's assume the given expression as 'A' for easy understanding.

Since, the square is always positive, we cannot get a negative number as a square. So, the square root of the negative number becomes an imaginary number because that number doesn't exist.

Now, on taking square root,

The complex numbers are always written as:

Where 'a' and 'b' are real numbers and 'i' is imaginary number.