Question

Approximate the real number solutions to the polynomial function f(x) = x3 + 4x2 – 4x – 16 ?

Answer 1

you have to solve it to find the real number solutions. Do you know if f(a)=0 then (x-a) is a factor of f(x)? this way you can obtain factors.

Answer 2

do you know about factor theorem and remainder theorem?

Answer 3

Try dividing by x+4 as a test factor.

Answer 4

\[x ^{3}+4x ^{2}-4x-16\over x+4\]