Question

The value of k for equal roots in -4x +2 = 0

a) 2 b) – 2 c) 4 d) – 4​

Answer 1

Answer:

Given: Quadratic equation 4x

2

+4

3

x+k=0, has equal roots

An equation has equal roots if the discriminant, D=b

2

−4ac=0

In the given equation, a=4,b=4

3

,c=k

Therefore the discriminant is (4

3

)

2

−4(4)(k)=0

48−16k=0

⟹16k=48

Therefore, k=3