If `A^(2)+2A+3I=O" and "|A|ne0," then "A^(-1)=`

If A^(2)+mA+nI=O" and n "ne0,|A|ne0," then "A^(-1)=

If A^(2) + 5A + 3I =0, |A| ne 0 then A^(-1) =………………..

If A is square matrix such that |A| ne 0 and A^2-A+2I=O " then " A^(-1) =?

If a^(2)- 3a + 1= 0 and a ne 0 , find : a^(2) + (1)/(a^(2))

If (a + (1)/(a))^(2) = 3 and a ne 0 , then show that: a^(3) + (1)/(a^(3))= 0

If A = ((3,1),(-1,2)), I = ((1,0),(0,1)) and O = ((0,0),(0,0)) show that, A^(2) - 5A + 7I = O . Hence find A^(-1) .

If a^(2)- 3a + 1= 0 and a ne 0 , find : a+ (1)/(a)

If a^(2) + (1)/(a^(2)) = 18 and a ne 0 , find: a^(3)- (1)/(a^(3))