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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade VIII - Quadratic Equations
Question
1
1.
Find the roots of the quadratic equation
(
24
x
2
−
30
x
+
9
)
=
0
(
5
4
,
(
-1
2
)
)
(
5
4
,
1
)
(
1
2
,
1
2
)
(
3
4
,
1
2
)
(
1
2
,
1
)
Question
2
2.
Solve :
2
x
−
1
(
x
−
2
)
=
5
(
x
−
3
)
(
3
8
−
1
8
√
603
)
,
(
3
8
+
1
8
√
603
)
(
3
8
√
4
−
1
8
√
201
)
,
(
3
8
√
4
+
1
8
√
201
)
(
3
8
−
1
8
√
201
)
,
(
3
8
+
1
8
√
201
)
(
3
8
−
1
8
√
402
)
,
(
3
8
+
1
8
√
402
)
(
3
8
√
5
−
1
8
√
201
)
,
(
3
8
√
5
+
1
8
√
201
)
Question
3
3.
Find the roots of the quadratic equation
(
x
2
+
6
x
+
8
)
=
0
(
0
,
-6
)
(
-2
,
-4
)
(
-1
,
-4
)
(
0
,
-5
)
(
-1
,
-5
)
Question
4
4.
Solve :
(
6
x
+
1
)
(
5
x
+
1
)
+
(
x
+
1
)
(
2
x
+
1
)
=
98
55
(
(
-4
15
)
,
0
)
(
0
,
5
)
(
(
-2
13
)
,
1
)
(
(
-2
15
)
,
2
)
(
(
-2
17
)
,
3
)
Question
5
5.
Solve :
(
x
+
1
)
(
5
x
+
1
)
=
(
6
x
+
3
)
(
28
x
+
3
)
(
0
,
-5
)
(
2
,
8
)
(
0
,
5
)
(
-1
,
4
)
(
-2
,
2
)
Question
6
6.
Find the roots of the quadratic equation
(
x
2
−
7
x
+
12
)
=
0
(
6
,
2
)
(
5
,
2
)
(
5
,
3
)
(
6
,
1
)
(
4
,
3
)
Question
7
7.
Solve the quadratic equation
x
−
2
=
63
x
(
11
,
-10
)
(
10
,
-8
)
(
11
,
-8
)
(
10
,
-7
)
(
9
,
-7
)
Question
8
8.
Solve :
63
x
2
+
19
a
b
x
−
30
a
2
b
2
= 0
5
a
b
11
,
−
2
a
b
3
5
a
b
9
,
−
6
a
b
7
7
a
b
9
,
−
4
a
b
7
a
b
3
,
−
8
a
b
7
5
a
b
7
,
−
6
a
b
5
Question
9
9.
Solve :
−
4
(
−
x
−
3
)
−
5
(
−
x
+
4
)
=
4
(
−
3
√
4
)
,
4
√
4
(
−
3
√
5
)
,
4
√
5
(
−
3
)
,
4
(
−
3
√
3
)
,
4
√
3
(
−
3
√
2
)
,
4
√
2
Question
10
10.
Find the discriminant of the quadratic equation
(
x
2
+
5
x
)
=
0
22
26
27
24
25
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