Question

find the value of 'k' ​

Answer 1

Answer:

coincident root means same roots.

given equation

x^2+4x+k=0

when roots are equal then ,

discriminant=0

b^2-4ac=0

16-4k=0

4k=16

k=4 ans

Answer 2

Answer:

k = 4

Step-by-step explanation:

coincident root means same root

hence, (α+β) = (-4)

or, 2α = (-4)

or, α = (-2)

∴ k = α² = (-2)×(-2) = 4