[1 2 21 If A= 2 1 2 show that A? - 4A 51 =...

Transcribed Image Text:

[1 2 21 If A= 2 1 2 show that A? - 4A – 51 = 0, where I,0 are the unit matrix and the null matrix of l2 2 1l order 3 respectively. Use this result to find A-1. [1 2 21 If A= 2 1 2 show that A? - 4A – 51 = 0, where I,0 are the unit matrix and the null matrix of l2 2 1l order 3 respectively. Use this result to find A-1.