$t$ : $\mathbb{F}_2[X]$ x $\mathbb{F}_2[X]$ x $\mathbb{F}_2[X]\rightarrow$ $\mathbb{F}_2$
$t(f,g,h):=f(0)g(0)h(1)+f(0)g(1)h(0)+f(1)g(0)h(0)$
How can I know if this is multilinear? Do I have to take random polynomials with $f,g$ and $h$?
I know that I can take such a basis {0,1},{1,0} for $\mathbb{F}_2[X]$, but I don't know how to implicate it in $t$.