Question
Given an example of:
A diagonal matrix which is not scalar.
A diagonal matrix which is not scalar.
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$ \begin{pmatrix} \text{3x + y}&\text{-y} \\ \text{2y - x}&\text{3} \\ \end{pmatrix}= \begin{pmatrix} \text{1}&\text{2} \\ \text{-5}&\text{3} \\ \end{pmatrix}.$
$\text{A}=\begin{bmatrix}\text{a}+4&3\text{b}\\8&-6\end{bmatrix},\text{ B}=\begin{bmatrix}2\text{a}+2&\text{b}^2+2\\8&\text{b}^2-5\text{b}\end{bmatrix}$