Find the Inverse of the Matrix $\left[ \begin{array} { c c } 2 & 1 \\- 4 & - 2\end{array} \right]$

question 104

Essay

Find the inverse of the matrix $\left[ \begin{array} { c c } 2 & 1 \\- 4 & - 2\end{array} \right]$ , if it exists.

---

Definitions:

Expenses

Costs incurred in the process of earning revenues, generally categorized as operating or non-operating.

Debit

An accounting entry that increases assets or expenses or decreases liabilities, equity, or revenue.

Credit

The granting of a loan and the creation of debt; any form of deferred payment.

Normal Balance

The typical side (debit or credit) on which an account increases, depending on the type of account.