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Byju's Answer
Standard VIII
Mathematics
Expansion of (x+y)^3
Question 3viF...
Question
Question 3(vi)
Find the following squares by using identities:
(
2
x
y
+
5
y
)
2
Open in App
Solution
(
2
x
y
+
5
y
)
2
=
(
2
x
y
)
2
+
2
×
2
x
y
×
5
y
+
(
5
y
)
2
[
U
s
i
n
g
i
d
e
n
t
i
t
y
(
a
+
b
)
2
=
a
2
+
2
a
b
+
b
2
]
=
4
x
2
y
2
+
20
x
y
2
+
25
y
2
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2
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Expansion of (x+y)^3
Standard VIII Mathematics
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