SOLUTION: Evaluate each function for the value specified. f(x)=x^2-x-2; find f(-2)

Algebra ->  Linear-equations -> SOLUTION: Evaluate each function for the value specified. f(x)=x^2-x-2; find f(-2)      Log On


   

Question 207548: Evaluate each function for the value specified. f(x)=x^2-x-2; find f(-2)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=x%5E2-x-2 Start with the given function.


f%28-2%29=%28-2%29%5E2--2-2 Plug in x=-2.


f%28-2%29=%28-2%29%5E2--2-2 Rewrite %28-2%29%5E2--2 as %28-2%29%5E2%2B2


f%28-2%29=4%2B2-2 Square -2 to get 4.


f%28-2%29=4 Combine like terms.