Question

determine the value of k such that -2 is one root of the equation 2x^3+(k+1)x^2=4-x^2. Then determine the other roots of the equation.

Answer 1

let x=-2, and solve for k

Answer 2

if -2 is a root, then divide it out of the equation and your left with a quadratic to play with

Answer 3

I am not getting the right answer when i try that!