Question

Which are real zeros of this function x^3+2x^2-9x-18

Answer 1

To solve the problem shown above, you must follow the proccedure shown below:

 1. You the following polynomial of degree 3:

 x^3+2x^2-9x-18

 2. When you factor it, you obtain:

 (x+2)(x-3)(x+3)=0

 3. Then, you obtain:

 x1=-2
 x2=3
 x3=-3

 4. Therefore, the correct answer is the last option (option e), which is shown below:

 e) -2,3,-3