If 
then find (-A2 + 6A).
Given : 
Matrix A is of order 2 
2.
To find : -A2 + 6A
Formula used :
Where cij = ai1b1j + ai2b2j + ai3b3j + ……………… + ainbnj
If A is a matrix of order a 
b and B is a matrix of order c 
d ,then matrix AB exists and is of order a 
d ,if and only if b = c
A2 = 
= 
= 
A2 = 
-A2 = 
= 
6A = 6 × 
= 
6A = 
-A2 + 6A = 
+ 
= 
= 
-A2 + 6A = 
1