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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade VIII - Special Products and Expansions
Question
1
1.
(
a
+
b
)
3
(
2
a
3
+
3
a
2
b
+
3
a
b
2
+
b
3
)
(
a
3
+
3
a
2
b
+
3
a
b
2
+
b
3
)
(
a
3
+
a
2
b
+
3
a
b
2
+
b
3
)
(
3
a
2
b
+
3
a
b
2
+
b
3
)
(
a
3
+
5
a
2
b
+
3
a
b
2
+
b
3
)
Question
2
2.
Evaluate
(
m
2
−
1
)
(
m
4
+
m
2
+
1
)
=
m
6
+
2
m
4
+
2
m
2
+
1
m
6
−
1
m
6
+
2
m
4
−
1
0
m
6
−
2
m
2
+
1
Question
3
3.
(
−
2
a
+
3
b
)
2
(
3
a
2
−
12
a
b
+
9
b
2
)
(
4
a
2
−
12
a
b
+
9
b
2
)
(
4
a
2
−
15
a
b
+
9
b
2
)
(
5
a
2
−
12
a
b
+
9
b
2
)
(
4
a
2
−
9
a
b
+
9
b
2
)
Question
4
4.
If
(
x
+
1
x
)
=
7
,
find the value of
(
x
4
+
1
x
4
)
2206
2207
2209
2208
2205
Question
5
5.
(
3
a
+
3
2
b
)
(
9
a
2
−
9
2
a
b
+
9
4
b
2
)
(
26
a
3
+
27
8
b
3
)
(
27
a
3
+
25
8
b
3
)
(
28
a
3
+
27
8
b
3
)
(
27
a
3
+
27
8
b
3
)
(
27
a
3
+
29
8
b
3
)
Question
6
6.
The value of
60
1
3
✕
60
2
3
is
3660
4
9
3660
2
9
3660
2
7
3660
2
11
3660
Question
7
7.
If
(
x
+
1
x
)
=
3
,
find the value of
(
x
3
+
1
x
3
)
15
19
17
20
18
Question
8
8.
The value of
501
1
3
✕
501
1
3
is
251334
8
9
251335
1
7
251335
1
11
251335
1
9
251335
1
3
Question
9
9.
(
2
a
+
4
b
)
2
(
4
a
2
+
14
a
b
+
16
b
2
)
(
5
a
2
+
16
a
b
+
16
b
2
)
(
4
a
2
+
16
a
b
+
16
b
2
)
(
4
a
2
+
19
a
b
+
16
b
2
)
(
3
a
2
+
16
a
b
+
16
b
2
)
Question
10
10.
(
2
a
−
b
)
(
4
a
2
+
2
a
b
+
b
2
)
(
7
a
3
−
b
3
)
(
8
a
3
−
b
3
)
(
8
a
3
−
3
b
3
)
(
8
a
3
+
2
b
3
)
(
9
a
3
−
b
3
)
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