SOLUTION: If F(x)= 3X to the 3rd power -6X to the 2nd power - x + 7, what is the value of f(2) + f(-2)? This question is multiple choice, it is either A. -34, B. 0, C. 2, D. 7, E. 14

Algebra ->  Equations -> SOLUTION: If F(x)= 3X to the 3rd power -6X to the 2nd power - x + 7, what is the value of f(2) + f(-2)? This question is multiple choice, it is either A. -34, B. 0, C. 2, D. 7, E. 14      Log On


   

Question 66254: If F(x)= 3X to the 3rd power -6X to the 2nd power - x + 7, what is the value of f(2) + f(-2)?
This question is multiple choice, it is either A. -34, B. 0, C. 2, D. 7, E. 14
Answer by 303795(602) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=3x%5E3-6x%5E2-x%2B7
f%282%29=3%282%29%5E3-6%2A%282%29%5E2-2%2B7
f%282%29=3%2A8-6%2A4%2B5
f%282%29=24-24%2B5
f%282%29=5
f%28-2%29=3%28-2%29%5E3-6%2A%28-2%29%5E2-%28-2%29%2B7
f%28-2%29=3%2A%28-8%29-6%2A4%2B2%2B7
f%28-2%29=-24-24%2B9
f%28-2%29=-39
So f%282%29%2Bf%28-2%29=5%2B%28-39%29=-34 (ie Choice A)