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Byju's Answer
Standard XII
Mathematics
Properties of Iota
Find the squa...
Question
Find the square root of complex number
z
=
3
+
4
i
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Solution
Given,
z
=
3
+
4
i
(
x
+
i
y
)
2
=
3
+
4
i
x
2
−
y
2
+
i
(
2
x
y
)
=
3
+
4
i
⇒
x
2
−
y
2
=
3
and
2
x
y
=
4
⇒
x
2
−
y
2
=
3
and
x
y
=
2
∴
x
=
2
and
y
=
1
⇒
√
3
+
4
i
=
2
+
i
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9
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