ii) 2a + 3b - 9, 4a - 6b, 3a + 2b, 6a - 2b
Answers
Answered by
1
Step-by-step explanation:
L.H.S =
∣
∣
∣
∣
∣
∣
∣
∣
a
2a
3a
a+b
3a+2b
6a+3b
a+b+c
4a+3b+2c
10a+6b+3c
∣
∣
∣
∣
∣
∣
∣
∣
R
2
→R
2
−2R
1
,R
3
→R
3
−2R
1
=
∣
∣
∣
∣
∣
∣
∣
∣
a
0
0
a+b
a
3a
a+b+c
2a+b
7a+3b
∣
∣
∣
∣
∣
∣
∣
∣
Expanding along first column
=a[a(7a+3b)−3a(2a+b)]−0+0
=a[7a
2
+3ab−6a
2
−3ab]
=a(a)
2
=a
3
=R.H.S.
Answered by
5
Answer:
9a - 3b -9
Step-by-step explanation:
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