Question

61. If 4x^2+ 4 + kx = 0 has equal roots, then k is
equal to
(1) _+8
(2) -+4
(3) -+2
(4) +-16​

Answer 1

Step-by-step explanation:

if eq has equal roots then discriminant will be equal to zero i.e.

D = √b^2-4ac = 0

Given equation:- 4x^2 + kx + 4 = 0

a = 4, b = k, c = 4

D = √k^2-64 = 0

k^2-64 = 0

k^2 = 64

k = +8, -8

Answer 2

Answer:

so the answer is 8...

Hope it helps