Question

Find the number "a" such that x+2 is a factor of x^3 +ax^2 +x-6 (medal given)

Answer 1

when x+m is the factor of f(x), then x=-m satisfies f(x)=0, means f(-m)=0

Answer 2

so here , just plug in x = -2 in your expression and equate it to 0

Answer 3

@hartnn thank you

Answer 4

welcome ^_^
if you want me to verify the value, tell me what you got ...