Comprehension for 14-16
Given three equations
x+2y+2z=0
2x+1y+2z=1
2x+2y+z=0
This can written in matrix form as AX=B
i.e.
\begin{bmatrix} 1 &2 &2 \\ 2 &1 &2 \\ 2 &2 &1 \end{bmatrix}\begin{bmatrix} x\\ y\\ z \end{bmatrix}=\begin{bmatrix} 0\\ 1\\ 0 \end{bmatrix}
A2-4A-4I=
-
UP 0 DOWN 0 0 0
