Question

Please help me!!! ASAP!!

Answer 1

C= $\left[\begin{array}{ccc}-5&26&\\9&-60\end{array}\right]$
Find the determinant;

9*1- 2*4= 1

Inverse of the matrix;
1($\left[\begin{array}{ccc}1&-4\\-2&9\end{array}\right]$

Pre-multiplying the matrix by the inverse on both the left hand side and the right hand side gives the answer above.