Question

GIVING MEDAL!!!!!

Which linear expression is a factor of the polynomial function f(x) = x3 + 2x2 − x − 2?




x − 2




x + 2




x + 3




x − 3

Answer 1

to find out which one is a factor use the Factor Theorem

If (x -a) is a factor then f(a) = 0

Answer 2

Try to put f(2) , f(-2), f(-3) and f(3). The one which gives the value 0 is a factor.

Answer 3

I tried that and I could figure it out

Answer 4

so if x - 3 is a factor then f(3) = 0

Answer 5

try f(-2) again

Answer 6

if this = 0 then x + 2 is a factor