Solve Matrix

$$\left. \begin{array} { l } { \text { If } A = \begin{bmatrix} \begin{array} { l l l } { 1 } & { 0 } & { 2 } \\ { 0 } & { 2 } & { 1 } \\ { 2 } & { 0 } & { 3 } \end{array} \end{bmatrix} \text { shour that } } \\ { A ^ { 3 } - 6 A ^ { 2 } + 7 \theta + 2 I = 0 } \end{array} \right.$$

Solve for A, θ, I (complex solution)

$$\theta =\frac{6t_{1744830465}-2I}{7}$$

$$A\in \mathrm{C}$$

$$I\in \mathrm{C}$$

Solve for A, θ, I

$$\theta =\frac{6t_{1744830465}-2I}{7}$$

$$A\in \mathrm{R}$$

$$I\in \mathrm{R}$$