Question

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

Answer 1

f(x) = x^3 - 4x^2 -4x + 16
f(x) = x^2(x-4) -4(x-4)
f(x) = (x-4)(x^2-4)
0 = (x-4)(x^2-4)

x - 4 = 0
x^2 - 4 = 0

x = 4

x^2 = 4
x = ±2

Therefore, 3 solutions

Answer 2

@boldjon: Remember: do NOT give away answers. Encourage the other person to find them himself. Re-read what the Code of Conduct says about that:

http://openstudy.com/code-of-conduct

Answer 3

oh.....i forgot *.*

Answer 4

Thank you for explaining

Answer 5

u welcoome