Mathematics 9 (Complete Solutions)

Q3
From the following matrices, identify diagonal, scalar and unit (identity) matrices.

A =
 
4 0
0 4
 
B =
 
2 0
0 -1
 
C =
 
1 0
0 1
 
D =
 
3 0
0 0
 
E =
 
5-3 0
0 1+1
 



Answer
Scalar matrices:  A, E Unit matrices:  C Diagonal matrices:  A, B, C, D, E

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