Question

Demonsyrați că matricea B este inversa matricei A​

Answer 1

$\it A\cdot B= \begin{pmatrix}\it5&\it 3\\\it3&\it2 \end{pmatrix}\cdot\begin{pmatrix}\it2&\it -3\\\it-3&\it \ 5 \end{pmatrix}=\begin{pmatrix}\it1&\it 0\\\it0&\it1 \end{pmatrix}=I_2 \Rightarrow B\ este\ inversa\ matricei\ A$