Does the parabola with equation x2 – x + 4 = 0 have real or imaginary roots?1. Real, because the discriminant is positive2. Real, because the discriminant is negative3. Imaginary, because the discriminant is positive4. Imaginary, because the discriminant is negative

4. If the determinant delta of a quadratic equation is positive, the equation has two real roots. If the determinant is negative, it has two imaginary roots. In this case, delta=b^2-4ac=(-1)^2-4*1*4=-15. Therefore, this equation has two imaginary roots.