If the roots of the equation be imaginary, then for all real values of X, the expression is
greater than
less than
greater than
less than
Discriminant of Quadratic Equation -
- wherein
is the quadratic equation
Complex Roots with non - zero Imaginary part -
- wherein
is the quadratic equation
Given has imaginary roots
Let
Here,
So, the given expression has a minimum value
[From eq.(i)]
Study 40% syllabus and score up to 100% marks in JEE