Symmetric Matrices & Quadratic Forms · Easy problem

Let $A = \begin{pmatrix}1 & 3 & 0\\3 & 2 & -2\\0 & -2 & 4\end{pmatrix}$. When $\mathbf x^{T}A\mathbf x$ is multiplied out as a polynomial in $x, y, z$ (with $\mathbf x = (x, y, z)$), what is the coefficient of $yz$?