Which one of the following polynomials has no real x-intercept?

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

Problem

Which one of the following polynomials has no real x-intercept? (a)

k(x)=x^{2}+4x+4

(b)

h(x)=x^{3}-x

(c)

f(x)=x^{2}+4x+5

(d)

g(x)=x^{2}-2x-8