\[\begin{bmatrix}X_{00}&X_{01}&\cdots&X_{0n}\\
X_{10}&X_{11}&\cdots&X_{1n}\\
\vdots&\vdots&\ddots&\vdots\\
X_{n0}&X_{n1}&\cdots&X_{nn}\end{bmatrix}\begin{bmatrix}a_{0}\\
a_{1}\\
\vdots\\
a_{n}\end{bmatrix}=\begin{bmatrix}F_{0}\\
F_{1}\\
\vdots\\
F_{n}\end{bmatrix},\]