How do you evaluate $f(x)=12x^2-19$ for $f(1/2)$ ?

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Answer 1 · 2016-11-09T23:05:59

$f(1/2) = -16$

Substitute $1/2$ for $x$ in $f(x)$ giving:

$f(1/2) = 12 (1/2)^2 - 19 =>$

$f(1/2) = 12 (1/2)(1/2) - 19 =>$

$f(1/2) = 12 (1/4) - 19 =>$

$f(1/2) = 3 - 19 =>$

$f(1/2) = -16$

How do you evaluate f(x)=12x^2-19f(x)=12x^2-19 for f(1/2)f(1/2)?