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Byju's Answer
Standard VIII
Mathematics
Finding Square of a Number Using Identity
Given that ...
Question
Given that
x
,
y
ϵ
R
, solve
4
x
2
+
3
x
y
+
(
2
x
y
−
3
x
2
)
i
=
4
y
2
−
(
x
2
2
)
+
(
3
x
y
−
2
y
2
)
i
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Solution
In the given equation, real parts of both LHS and RHS will be equal
Therefore,
4
x
2
+
3
x
y
=
4
y
2
−
x
2
2
⟹
9
x
2
+
6
x
y
−
8
y
2
=
0
9
x
2
+
12
x
y
−
6
x
y
−
8
y
2
=
0
3
x
(
3
x
+
4
y
)
−
2
y
(
3
x
+
4
y
)
=
0
(
3
x
+
4
y
)
(
3
x
−
2
y
)
=
0
…
(
1
)
Similarly, imaginary parts are equal
2
x
y
−
3
x
2
=
3
x
y
−
2
y
2
⟹
3
x
2
+
x
y
−
2
y
2
=
0
3
x
2
+
3
x
y
−
2
x
y
−
2
y
2
=
0
3
x
(
x
+
y
)
−
2
y
(
x
+
y
)
=
0
(
x
+
y
)
(
3
x
−
2
y
)
=
0
…
(
2
)
From (1) and (2)
3
x
=
2
y
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0
Similar questions
Q.
Given that
x
,
y
ϵ
R
, Solve the complex equation:
4
x
2
+
3
x
y
+
(
2
x
y
−
3
x
2
)
i
=
4
y
2
−
(
x
2
2
)
+
(
3
x
y
−
2
y
2
)
i
Q.
Find the real values of
x
and
y
for which the following equation is satisfied.
(i)
(
2
+
3
i
)
x
2
−
(
3
−
2
i
)
y
=
2
x
−
3
y
+
5
i
(ii)
4
x
2
+
3
x
y
+
(
2
x
y
−
3
x
2
)
i
=
4
y
2
−
(
x
2
2
)
+
(
3
x
y
−
2
y
2
)
i
Q.
Simplify
(
−
4
x
2
−
2
x
y
+
9
y
2
)
−
(
3
x
2
−
3
x
y
+
7
y
2
)
Q.
State True or False:
3
x
2
+
5
x
y
−
4
y
2
+
x
2
−
8
x
y
−
5
y
2
is equal to
4
x
2
−
3
x
y
−
9
y
2
.
Q.
Solve:
(
2
x
y
−
x
y
)
(
3
x
y
−
5
)
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