Question 274760
{{{f(x)=4x^2-2}}} Start with the given equation.



{{{f(1/2)=4(1/2)^2-2}}} Plug in {{{x=1/2}}}.



{{{f(1/2)=4(1/4)-2}}} Square {{{1/2}}} to get {{{1/4}}}.



{{{f(1/2)=1-2}}} Multiply {{{4}}} and {{{1/4}}} to get {{{1}}}.



{{{f(1/2)=-1}}} Combine like terms.