x 
=
=
=
From the above matrices, we obtain
(i). (x-2)+2(y+1) = 1
(ii). 2(x-2)+5(y+1) = 0
Solving these two equations, x = 7 and y = -3.
2.
a)
x
=
=
=
b)
)
= 
=
)
= 
=
Example 2.4.1 Matrix Arithmetic
Answers:
| 1. | x =
=
=
From the above matrices, we obtain (i). (x-2)+2(y+1) = 1 (ii). 2(x-2)+5(y+1) = 0 Solving these two equations, x = 7 and y = -3. |
|
2. |
a) |
AB = x
=
= =
|
b) |
2A = 2()
= =
|
|
| c) | 3B = 3()
= =
|
