Question

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

a 1,2,3
b 3,-3,2
c 2,3,-6
d 1,-1,18
e -2,3,-3

Answer 1

E. -2, 3, -3

Explanation:

correct for plato

Answer 2

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