SOLUTION: Evaluate the polynomial for x=-1 -5x^3+7x^2-4x-1 simplify your answer. Type an integer or a fraction I just don't understand this totally yet. Please help me...

Algebra ->  Inequalities -> SOLUTION: Evaluate the polynomial for x=-1 -5x^3+7x^2-4x-1 simplify your answer. Type an integer or a fraction I just don't understand this totally yet. Please help me...      Log On


   

Question 619135: Evaluate the polynomial for x=-1
-5x^3+7x^2-4x-1
simplify your answer. Type an integer or a fraction
I just don't understand this totally yet. Please help me...
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Replace x with -1 and evaluate.

-5x^3+7x^2-4x-1

-5(-1)^3+7(-1)^2-4(-1)-1

-5(-1)+7(1)-4(-1)-1

5+7+4-1

15

So -5x^3+7x^2-4x-1 = 15 when x = -1