Question
In Exercises 35-40, use the formula on page 603 to find the inverse of the $2 \times 2$ matrix (if it exists).$\left[\begin{array}{r} -4 & -6 \\ 2 & 3 \end{array} \right]$
Step 1
This can be done by calculating the determinant of the matrix. The determinant of a $2 \times 2$ matrix $\left[\begin{array}{cc} a & b \\ c & d \end{array} \right]$ is given by $ad - bc$. Show more…
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