$$\frac{ 1 }{ 2 } - \frac{ 1 }{ 40 } { x }^{ 2 }$$
$\frac{20-x^{2}}{40}$
$$\frac{20-x^{2}}{40}$$
Show Solution
Hide Solution
$-\frac{x^{2}}{40}+\frac{1}{2}$
