SOLUTION: Evaluate the polynomial for x=-1 -4x^(3)+8x^(2)-9x-1 Simplify your answer.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Evaluate the polynomial for x=-1 -4x^(3)+8x^(2)-9x-1 Simplify your answer.       Log On


   

Question 600415: Evaluate the polynomial for x=-1
-4x^(3)+8x^(2)-9x-1
Simplify your answer.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Replace 'x' with -1 and evaluate/simplify to find the answer.

-4x^3+8x^2-9x-1

-4(-1)^3+8(-1)^2-9(-1)-1

-4(-1)+8(1)-9(-1)-1

4+8+9-1

20


So -4x^3+8x^2-9x-1 = 20 when x = -1