Question

If ax2+bx+c=0 has equal roots, then b is equal to ______.​

Answer 1

Answer:

see picture for the answer.

Answer 2

Step-by-step explanation:

For the equation to have equal roots, the discriminant must be equal to zero.

D= b

2

−4ac=0

⇒ b

2

=4ac

⇒ c=

4a

b

2