The equation 2x^2 - 4x + 5 is of the form ax^2 + bx + c, where a = 2, b = -4 and c = 5
b^2 - 4*a*c = 16 - 40 = -24
As the determinant b^2 - 4ac is negative, the roots of the equation are imaginary.
This is because of the fact that the roots of a quadratic equation have the term sqrt (b^2 - 4ac) and the square root of a negative number is imaginary.
The roots of the equation are imaginary