SOLUTION: Evaluate f(x)= 4x^2 - 2 for f(1/2)

Algebra ->  Graphs -> SOLUTION: Evaluate f(x)= 4x^2 - 2 for f(1/2)       Log On


   

Question 274760: Evaluate f(x)= 4x^2 - 2 for f(1/2)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=4x%5E2-2 Start with the given equation.


f%281%2F2%29=4%281%2F2%29%5E2-2 Plug in x=1%2F2.


f%281%2F2%29=4%281%2F4%29-2 Square 1%2F2 to get 1%2F4.


f%281%2F2%29=1-2 Multiply 4 and 1%2F4 to get 1.


f%281%2F2%29=-1 Combine like terms.