Question

Use the given zero to find all the zeros of the function f(x)=x^3+x^2+9x+9 r=3i

Answer 1

r = 3 is not a 0

Answer 2

its r=3i

Answer 3

ah ok.

Answer 4

if 3i is a root, then so is -3i

Answer 5

so (x-3i) and (x+3i) are factors, so a factor is (x-3i)(x+3i) = x^2 + 9

Answer 6

We divide by this factor to get x + 1

Answer 7

so the last root is -1

Answer 8

All three roots are : 3i, -3i, and -1