Question

A quadratic equation ax2+bx+c=0 has coincident roots, if


b2−4ac=0
b2−4ac>0
b2−ac=0
b2−4ac<0

Answer 1

$\sf\huge\bold{Answer:}$

Given :

• Quadratic equation :ax²+bx+c=0
• Coincident roots

To find :

• Value of discriminant(b²-4ac)

Solution :

When roots are coincident to each other, then discriminant D = 0 for a quadratic equation.

• Discriminant

→D=b²-4ac

→0=b²-4ac

i.e b²-4ac = 0