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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade VIII - Quadratic Equations
Question
1
1.
Solve :
(
x
−
4
)
(
x
−
6
)
+
(
x
+
2
)
(
x
−
8
)
=
86
15
(
25
4
,
10
)
(
99
16
,
12
)
(
89
14
,
13
)
(
87
14
,
11
)
(
85
14
,
8
)
Question
2
2.
Solve :
(
8
x
+
2
)
(
30
x
+
1
)
=
(
3
x
+
1
)
(
11
x
+
2
)
(
(
-1
2
)
,
3
)
(
1
2
,
6
)
(
-1
,
2
)
(
1
2
,
-3
)
(
(
-3
2
)
,
1
)
Question
3
3.
Solve :
−
2
(
−
x
−
3
)
+
4
(
x
+
4
)
=
−
4
(
−
4
√
3
)
,
(
−
3
√
3
)
(
−
4
√
5
)
,
(
−
3
√
5
)
(
−
4
√
2
)
,
(
−
3
√
2
)
(
−
4
√
4
)
,
(
−
3
√
4
)
(
−
4
)
,
(
−
3
)
Question
4
4.
Solve the quadratic equation
x
−
30
x
=
1
(
6
,
-5
)
(
9
,
-8
)
(
7
,
-5
)
(
9
,
-6
)
(
7
,
-6
)
Question
5
5.
Find the discriminant of the quadratic equation
(
x
2
−
5
x
)
=
0
23
24
26
28
25
Question
6
6.
Find the roots of the quadratic equation
(
x
2
−
11
x
+
30
)
=
0
(
7
,
4
)
(
8
,
4
)
(
6
,
5
)
(
7
,
5
)
(
8
,
2
)
Question
7
7.
Solve :
27
x
2
−
39
a
b
x
+
14
a
2
b
2
= 0
a
b
,
2
a
b
5
a
b
9
,
0
7
a
b
9
,
2
a
b
3
7
a
b
11
,
2
a
b
5
a
b
,
4
a
b
3
Question
8
8.
Find the roots of the quadratic equation
(
32
x
2
−
28
x
+
3
)
=
0
(
3
4
,
1
8
)
(
1
2
,
1
6
)
(
1
2
,
1
8
)
(
5
4
,
1
6
)
(
5
4
,
(
-1
8
)
)
Question
9
9.
Find the roots of the quadratic equation
(
18
x
2
−
33
x
+
12
)
=
0
(
6
5
,
1
2
)
(
6
5
,
1
)
(
2
,
(
-1
2
)
)
(
2
,
1
)
(
4
3
,
1
2
)
Question
10
10.
Solve :
1
(
x
+
5
)
−
5
(
−
x
+
5
)
=
2
(
x
−
3
)
(
−
1
4
−
1
4
√
41
)
,
(
−
1
4
+
1
4
√
41
)
(
−
1
4
√
5
−
1
4
√
41
)
,
(
−
1
4
√
5
+
1
4
√
41
)
(
−
1
4
−
1
4
√
82
)
,
(
−
1
4
+
1
4
√
82
)
(
−
1
4
−
1
4
√
123
)
,
(
−
1
4
+
1
4
√
123
)
(
−
1
4
√
4
−
1
4
√
41
)
,
(
−
1
4
√
4
+
1
4
√
41
)
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