# Christmas Streak 65/88: Functional Equation #1

Algebra Level 2

For a function $f:\mathbb{R}\to\mathbb{R}$ that satisfies the functional equation below, find the value of $f(3).$

$\large f(x)+2f(1-x)=3x^2$

This problem is a part of <Christmas Streak 2017> series.

×