Cramer's rule/3x3/Exercise

We consider the matrix

${}A={\begin{pmatrix}1&0&2\\2&1&3\\1&0&1\end{pmatrix}}\in \operatorname {Mat} _{3}(\mathbb {R} )\,.$

Solve the linear system ${}Ax=(1,0,2)^{t}$ using Cramer's rule (check first that we may apply this rule).

Create a solution