The quadratic polynomial has equal zeros

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

The quadratic polynomial

2x^2 + kx + 8

has equal zeros. If

k

is positive, which of the following is the correct pair of

k

and the factorised form of the polynomial? (a)

k = 8,\;2(x-2)^2

(b)

k = 16,\;2(x+4)^2

(c)

k = 8,\;2(x+2)^2

(d)

k = 4,\;2(x+2)^2