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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Expansions
Question
1
1.
(
2
a
−
2
b
)
(
4
a
2
+
4
a
b
+
4
b
2
)
(
8
a
3
−
11
b
3
)
(
8
a
3
−
8
b
3
)
(
7
a
3
−
8
b
3
)
(
8
a
3
−
5
b
3
)
(
9
a
3
−
8
b
3
)
Question
2
2.
Expand
(
x
−
1
)
(
x
+
1
)
(
x
2
+
1
)
x
5
+
x
4
+
x
3
+
x
2
x
4
−
1
3
x
5
+
7
x
3
+
3
x
4
+
7
x
2
+
4
x
+
4
−
2
x
3
−
2
x
Question
3
3.
If
(
a
−
b
)
=
2
,
a
b
=
24
, find
(
a
3
−
b
3
)
154
150
152
153
151
Question
4
4.
Expand
(
x
−
1
x
)
(
x
+
1
x
)
(
x
2
+
1
x
2
)
x
5
+
x
3
+
x
+
1
x
3
x
5
+
6
x
+
3
x
3
+
6
x
+
3
x
3
+
3
x
5
−
x
−
2
x
3
−
1
x
7
x
4
−
1
x
4
Question
5
5.
The value of
37
✕
39
is
1442
1444
1446
1443
1440
Question
6
6.
If
(
x
+
1
x
)
=
6
,
find the value of
(
x
3
+
1
x
3
)
198
195
200
197
199
Question
7
7.
If
(
3
a
+
5
b
)
=
38
,
a
b
=
24
, find
(
9
a
2
+
25
b
2
)
725
723
726
721
724
Question
8
8.
(
−
2
3
a
+
2
3
b
)
(
4
9
a
2
+
4
9
a
b
+
4
9
b
2
)
(
−
8
27
a
3
+
8
27
b
3
)
(
−
8
25
a
3
+
8
27
b
3
)
(
−
8
29
a
3
+
8
27
b
3
)
(
−
8
27
a
3
+
10
27
b
3
)
(
−
8
27
a
3
+
2
9
b
3
)
Question
9
9.
If
(
a
2
−
b
2
)
=
27
,
a
b
=
18
, find
(
a
−
b
)
1
3
4
2
5
Question
10
10.
If
(
x
2
+
1
x
2
)
=
14
,
find the value of
(
x
+
1
x
)
1
5
3
4
6
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