Solve the following

Question:

If $A=\left(\begin{array}{ll}2 & 2 \\ 9 & 4\end{array}\right)$ and $I=\left(\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right)$, then $10 A^{-1}$ is equal to

  1. $4 \mathrm{I}-\mathrm{A}$

  2. $\mathrm{A}-6 \mathrm{I}$

  3. $6 \mathrm{I}-\mathrm{A}$

  4. $\mathrm{A}-4 \mathrm{I}$


Correct Option: , 2

Solution:

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