Question

Q4 Find the value of x.y and :
(a)
.
70
2
y​

Answer 1

Answer:

x+y=[

7

2

0

5

]−−−−−(1)

x−y=[

3

0

0

3

]−−−−−(2)

on adding (1) and (2) to

x+y+x−y=[

7

2

0

5

]+[

3

0

0

3

]

2x=[

10

2

0

8

]

x=

2

1

[

10

2

0

8

]

x=[

5

1

0

4

]

on subtracting (1) and (2)

x+y−x+y=[

7

2

0

5

]−[

3

0

0

3

]

2y=[

4

2

0

2

]

y=

2

1

[

4

2

0

2

]

y=[

2

1

0

1

]

Hence, this is the answer.