Question

Which of the following is a root of the polynomial shown below f(x)=x^3+2x^2-x-2

Answer 1

Answer:

Roots: -1, 1, -2

Step-by-step explanation:

Answer 2

F(x) = x^3 + 2x^2 - x - 2 
f(x) = x^2(x + 2) - (x + 2) 
f(x) = (x^2 - 1)(x + 2) 
f(x) = (x + 1)(x - 1)(x + 2) 
Roots: -1, 1, -2