Question

What are the zeros of the polynomial function: f(x) = (x – 3)(x + 1)(x + 5)?

and

If f(x) = 2x2 – 4x + 5 and g(x) = 2x – 2, what is f(x) + g(x) ?

Answer 1

You see three factors, right?

Answer 2

yup

Answer 3

You may evaluate each zero from looking at the factors.
If \(k\) is a zero, then \(x - k\) is a factor.

Answer 4

So, in \(x - 3\), \(k\) looks like 3 right?

Answer 5

Just do the same for all the others.
Careful if you have a positive sign.
If you have \(x + k\), then you may express it as \(x + (-k)\) so then -k will be a zero.