Question

A quadratic equation ax square+b +c=0 has two equal roots when b square-4ac is:

Answer 1

A quadratic equation ax² + bx + c = 0 has two equal roots when b² - 4ac is zero.

★ Some noteworthy points :-

D = b² - 4ac

D is called discriminant.

1. D > 0

Both the roots are real and distinct.

2. D = 0

Both the roots are real and equal.

3. D < 0

Both the roots are imaginary.