if A= [ 3 1] , Show that A2-5A+7I=0; Hence also find A3 [-1 2 ] - Maths - Matrices

Question

if A= [ 3 1] , Show that A2-5A+7I=0; Hence also find
A3
[-1 2 ]

Priyanka Kedia · Accepted Answer

Refer the following link:

https://www meritnation
com/ask-answer/question/if-a-3-1-show-that-a2-5a-7i-0-1-2-and-hence-find/matrices/7529051

A3=A2×A=85-53×31-12=1918-181