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Byju's Answer
Standard XII
Mathematics
Algebra of Complex Numbers
State true or...
Question
State true or false:
(
a
+
i
b
)
2
(
a
−
i
b
)
−
(
a
−
i
b
)
2
(
a
+
i
b
)
=
2
b
(
3
a
2
−
b
2
)
a
2
+
b
2
i
.
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Solution
(
a
+
i
b
)
2
(
a
−
i
b
)
−
(
a
−
i
b
)
2
(
a
+
i
b
)
=
(
a
+
i
b
)
3
−
(
a
−
i
b
)
3
(
a
−
i
b
)
(
a
+
i
b
)
=
2
(
3
a
2
.
i
b
+
i
3
b
3
)
a
2
+
b
2
=
2
(
3
a
2
b
−
b
3
)
a
2
+
b
2
i
=
2
b
(
3
a
2
−
b
2
)
a
2
+
b
2
i
.
Ans: 1
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