Regarding test case

what is the meaning of test case in challenges

@Namanjain123 hey Naman in this question you have to calculate roots of the equation using the quadratic formula first you have to check the value of d by the formula of the discriminant which is bb-4a*c based upon the value of d the three cases arises real and equal, real and distinct and imaginary you have to print roots of the equations followed by the conditions which above discussed.