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Byju's Answer
Standard VII
Mathematics
(a + b)^2 = a^2 + 2ab +b^2
Question 88 x...
Question
Question 88 (xviii)
Factorise the following expression.
2
a
x
2
+
4
a
x
y
+
3
b
x
2
+
2
a
y
2
+
6
b
x
y
+
3
b
y
2
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Solution
We have
2
a
x
2
+
4
a
x
y
+
3
b
x
2
+
2
a
y
2
+
6
b
x
y
+
3
b
y
2
=
(
2
a
x
2
+
2
a
y
2
+
4
a
x
y
)
+
(
3
b
x
2
+
3
b
y
2
+
6
b
x
y
)
=
2
a
(
x
2
+
y
2
+
2
x
y
)
+
3
b
(
x
2
+
y
2
+
2
x
y
)
=
(
2
a
+
3
b
)
(
x
+
y
)
2
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Q.
Question 92 (xviii)
Factorise the following using the identity
a
2
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b
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(
a
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(
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(
a
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Q.
The electric field in a region is given by:
→
E
=
(
4
a
x
y
√
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(
2
a
x
2
√
z
)
^
j
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y
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)
^
k
, where
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Q.
Question 88 (i)
Factorise the following expression.
6
a
b
+
12
b
c
Q.
Question 88 (ii)
Factorise the following expression.
(
−
x
y
−
a
y
)
Q.
Question 88 (iv)
Factorise the following expression.
l
2
m
2
n
−
l
m
2
n
2
−
l
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(a + b)^2 = a^2 + 2ab +b^2
Standard VII Mathematics
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