SOLUTION: Hi I am working on Polynomials for homework and I am not sure how to solve this problem here is the problem. x^3-3x^2-x+9 for a.x=3 b.x=-3

Question 1059782: Hi I am working on Polynomials for homework and I am not sure how to solve this problem here is the problem.
x^3-3x^2-x+9 for
a.x=3
b.x=-3
Answer by acw1213(28) (Show Source): You can put this solution on YOUR website!
For a), plug in 3 for "x" in the polynomial and solve using PEMDAS
(3)^3 - 3(3)^2 - (3) + 9
27 - 3(9) - 3 + 9
27 - 27 - 3 + 9
-3 + 9
6
For b), plug in -3 for "x" in the polynomial and solve using PEMDAS
(-3)^3 - 3(-3)^2 - (-3) + 9
-27 - 3(9) + 3 + 9
-27 - 27 + 3 + 9
-54 + 3 + 9
-51 + 9
-42
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