SOLUTION: Evaluate the Polynomial x^3+2x^2+5x-1 when x=-2 This is how I did it: -2x^3+2.-2^2+5.-2-1 -2x^3=2.4-10-1 -2x^3+8-10-1 -2x^3-2-1 -2x^3-3 What is 3(x^2)^3 times (-2x^5)^3

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Evaluate the Polynomial x^3+2x^2+5x-1 when x=-2 This is how I did it: -2x^3+2.-2^2+5.-2-1 -2x^3=2.4-10-1 -2x^3+8-10-1 -2x^3-2-1 -2x^3-3 What is 3(x^2)^3 times (-2x^5)^3       Log On


   

Question 31321: Evaluate the Polynomial x^3+2x^2+5x-1 when x=-2
This is how I did it:
-2x^3+2.-2^2+5.-2-1
-2x^3=2.4-10-1
-2x^3+8-10-1
-2x^3-2-1
-2x^3-3
What is 3(x^2)^3 times (-2x^5)^3
Thanks in advance!
Answer by blubunny01(20) About Me  (Show Source):
You can put this solution on YOUR website!
To evaluate a polynomial, all you need to do is plug x=-2 into your original polynomial:
%28-2%29%5E3%2B2%28-2%29%5E2%2B5%28-2%29-1
%28-8%29%2B2%284%29-10-1
%28-8%29%2B8-10-1
-11