Question

What are the zeros of the polynomial function f(x) = (x + 6)(x + 8)(x + 15)?

Answer 1

Set all the factors equal to 0 and solve for x.

1) x + 6 = 0

x = -6

2) x + 8 = 0

x = -8

3) x + 15 = 0

x = -15

When the function is graphed, you can see that the function crosses the numbers -15, -8, and -6 on the x-axis. These are the zeros.