Write a VBA program to find the real and complex roots of the quadratic equation.
Note that VBA will give an error message if you try to take the square root of a negative number or divide by zero.
For this reason, you will need to verify the sign of the term within the square root (called the "determinant") and whether the denominator in the formula is zero before using the quadratic equation.
Note that the output when the denominator is less than zero should include "i", the imaginary number equal to the square root of -1 (i.e. 4+3i).