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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Expansions
Question
1
1.
(
−
2
a
−
3
2
b
)
2
(
4
a
2
+
9
a
b
+
9
4
b
2
)
(
3
a
2
+
6
a
b
+
9
4
b
2
)
(
4
a
2
+
6
a
b
+
9
4
b
2
)
(
5
a
2
+
6
a
b
+
9
4
b
2
)
(
4
a
2
+
3
a
b
+
9
4
b
2
)
Question
2
2.
The value of
503
✕
497
is
249990
249991
249992
249988
249994
Question
3
3.
The value of
799
3
4
✕
799
3
4
is
639600
1
16
639600
1
18
639600
3
16
639600
1
14
639599
15
16
Question
4
4.
The value of
201
1
3
✕
201
1
3
is
40535
1
7
40535
1
11
40535
1
3
40535
1
9
40534
8
9
Question
5
5.
The value of
28
✕
23
is
644
645
641
647
643
Question
6
6.
(
−
3
2
a
+
2
b
)
(
9
4
a
2
+
3
a
b
+
4
b
2
)
(
−
33
10
a
3
+
8
b
3
)
(
−
7
2
a
3
+
8
b
3
)
(
−
27
8
a
3
+
5
b
3
)
(
−
27
8
a
3
+
11
b
3
)
(
−
27
8
a
3
+
8
b
3
)
Question
7
7.
If
(
a
4
+
b
4
)
=
881
,
a
b
=
20
, find
(
a
+
b
)
12
6
9
8
10
Question
8
8.
(
−
5
a
+
5
b
+
c
)
(
25
a
2
+
25
a
b
+
5
a
c
+
25
b
2
−
5
b
c
+
c
2
)
(
−
126
a
3
+
75
a
b
c
+
125
b
3
+
c
3
)
(
−
124
a
3
+
75
a
b
c
+
125
b
3
+
c
3
)
(
−
125
a
3
+
78
a
b
c
+
125
b
3
+
c
3
)
(
−
125
a
3
+
72
a
b
c
+
125
b
3
+
c
3
)
(
−
125
a
3
+
75
a
b
c
+
125
b
3
+
c
3
)
Question
9
9.
Expand
(
x
−
1
)
(
x
+
1
)
(
x
2
+
1
)
x
4
−
1
x
5
+
x
4
+
x
3
+
x
2
−
2
x
3
−
2
x
3
x
5
+
6
x
3
+
3
x
4
+
6
x
2
+
3
x
+
3
Question
10
10.
(
−
2
a
+
3
b
)
(
4
a
2
+
6
a
b
+
9
b
2
)
(
−
9
a
3
+
27
b
3
)
(
−
8
a
3
+
29
b
3
)
(
−
8
a
3
+
27
b
3
)
(
−
8
a
3
+
24
b
3
)
(
−
7
a
3
+
27
b
3
)
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