Vì $f(x)=f(-x)$ nên $f(x)$ là đa thức chẵn hay $f(x)=ax^4+bx^2+c$
Khi đó ta có:
$\left\{\begin{array}{l}c=2035\\a+b+c=2221\\16a+4b+c=2013\end{array}\right. \Leftrightarrow \left\{\begin{array}{l}a=-\dfrac{383}{6}\\b=\dfrac{1499}{6}\\c=2035\end{array}\right.$
Suy ra: $f(x)=-\dfrac{383}{6}x^4+\dfrac{1499}{6}x^2+2035 \Rightarrow f(3)=-887$