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Byju's Answer
Standard XII
Mathematics
Properties of Conjugate of a Complex Number
If 3x - 4y ...
Question
If
3
x
−
4
y
=
√
x
y
then
9
x
2
+
16
y
2
Open in App
Solution
3
x
−
4
y
=
√
x
y
(
3
x
−
4
y
)
2
=
x
y
⇒
9
x
2
+
16
y
2
−
24
x
y
=
x
y
⇒
9
x
2
+
16
y
2
=
x
y
+
24
x
y
=
25
x
y
∴
9
x
2
+
16
y
2
=
25
x
y
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Similar questions
Q.
If
3
x
+
4
y
=
16
and
x
y
=
4
; find the value of
9
x
2
+
16
y
2
.
Q.
The value of
9
x
2
−
24
x
y
+
16
y
2
3
x
−
4
y
is
Q.
Question 13
Square of
3
x
−
4
y
is
a)
9
x
2
−
16
y
2
b)
6
x
2
−
8
y
2
c)
9
x
2
+
16
y
2
+
24
x
y
d)
9
x
2
+
16
y
2
−
24
x
y
Q.
Reduce to lowest terms :
(
3
x
+
4
y
)
9
x
2
−
16
y
2
Q.
Factorise the expression:
9
x
2
+
24
x
y
+
16
y
2
−
25
z
2
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Standard XII Mathematics
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