Show that A=[{:(5,3),(-1,-2):}] satisfi...

Show that `A=[{:(5,3),(-1,-2):}]` satisfies the equation `A^(2)=3A-7I=0` and hence find `A^(-1)`.

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The correct Answer is:

`=-(1)/(7)[{:(-2,-3),(1,5):}]`

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