Help me with a shortcut method of finding matrices using inverse method​

There is no manual shortcut except you're using a program like MATLAB or Mathcad.

Otherwise the process still remains the same:

1. Find the determinant |a|

2. Find the minor, then find the cofactors C

3. Find the adjoint of a which is the transpose of C

4. Find the inverse with

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

the correct answer is the name of the author of the quotation appears at the text leading up to it   apex 2018