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Byju's Answer
Standard XII
Mathematics
Determinant
If 6i -3i...
Question
If
∣
∣ ∣
∣
6
i
−
3
i
1
4
3
i
−
1
20
3
i
∣
∣ ∣
∣
=
x
+
i
y
,
where
i
=
√
−
1
, then what is x equal to?
A
3
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B
2
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C
1
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D
0
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Solution
The correct option is
C
0
∣
∣ ∣
∣
6
i
−
3
i
1
4
3
i
−
1
20
3
i
∣
∣ ∣
∣
R
1
→
R
1
+
R
2
∣
∣ ∣
∣
6
i
+
4
0
0
4
3
i
−
1
20
3
i
∣
∣ ∣
∣
6
i
+
4
(
−
3
+
3
)
=
0
⇒
0
+
i
(
0
)
=
x
+
i
4
⇒
x
=
0
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0
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