Which of the following polynomial functions can never take negative values for any real ?

MATHEMATICS · Single correct · AP · AP Precalculus · Polynomial and Rational Functions · Polynomial and Rational Functions

Problem

Which of the following polynomial functions can never take negative values for any real

x

? (a)

x^{6}-1

(b)

4x^{4}

(c)

-2x^{6}

(d)

x^{4}-4x^{2}