Question

Approximate the real number solutions to the polynomial function f(x) = x3 + 2x2 – 16x – 32

Answer 1

What class is this for?

Answer 2

Algebra.

Answer 3

I get confused when it has more than 3 terms. >.<

Answer 4

The rational candidates for solution to this equation are all the factors of leading coefficient and the constant coefficient:
so, x^3 tells us the leading coefficient is 1, so +1 and -1 are candidates.
-32 tell us that all its factors are candidates, so try them all out. +/-1, +/-2, +/-4, ...and so on until /-32.

Answer 5

+/-32

Answer 6

ur avatar is so kawaii C:'
x^3+2x^2-16x-32
x^2(x+2) - 16(x+2)
(x^2-16)(x+2)
(x-4)(x+4)(x+2)

here is my method, hear jlvm as well
*run*

Answer 7

:D Thank you very much~!

Answer 8

hahaha, nothing beats factoring @nphuongsun93