The matrix $A=\left(\begin{array}{ll}2 & 3 \ 1 & 2\end{array} ight)$ satisfies the equation

Question

The matrix $A=\left(\begin{array}{ll}2 & 3 \ 1 & 2\end{array}ight)$ satisfies the equation

Professor PC Thomas Classes · Answer

Characteristic equation yields $A^2 - 4A + I = 0$.