Question

If the roots of a quadratic equation are equal, then 

A) b² = 4ac 

B) b² – 4ac < 0 

C) b² – 4ac > 0 

D) b² – 4ac = 0

Answer 1

Correct option is (A) b² = 4ac

If roots of quadratic equation \(ax^2+bx+c=0\) are equal, then \(b^2-4ac=0\) or \(b^2= 4ac.\)

Answer 2

Correct option is A) b² = 4ac