SOLUTION: given the function f(x)=-4x^2-1, identify the value of f(-2). I am not sure how to do this?

Algebra ->  Equations -> SOLUTION: given the function f(x)=-4x^2-1, identify the value of f(-2). I am not sure how to do this?      Log On


   

Question 56383: given the function f(x)=-4x^2-1, identify the value of f(-2). I am not sure how to do this?
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
+f%28x%29=-4x%5E2-1+
Plug in -2 for all x values
+f%28-2%29=-4%28-2%29%5E2-1+
work the exponet
+f%28-2%29=-4%284%29-1+
multiply
+f%28-2%29=-16-1+
Add
+f%28-2%29=-17+