In the given equation 2x² + kx + 4 = 0

Let α and β be the two roots

α = 2 (given)

here a = 2, b = k and c = 4

sum of the roots

⇒ α + β =

⇒ 2 + β =

β = – k

α β = 2

β = 2/2 = 1(putting value of α = 2)