SOLUTION: Find the value of the polynomial x^3 -4x when x = -2. The answer I came up with was 0 or -8+8 is this correct? Thanks

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find the value of the polynomial x^3 -4x when x = -2. The answer I came up with was 0 or -8+8 is this correct? Thanks      Log On


   

Question 70803This question is from textbook Beginning Algebra
: Find the value of the polynomial x^3 -4x when x = -2.
The answer I came up with was 0 or -8+8 is this correct?
Thanks This question is from textbook Beginning Algebra

Found 2 solutions by josmiceli, jim_thompson5910:
Answer by josmiceli(19441) About Me  (Show Source):
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E3+-4xStart with given function
%28-2%29%5E3-4%28-2%29Plug in value x=-2
-8%2B8=0So you were correct (-8+8 is 0)