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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade VIII - Quadratic Equations
Question
1
1.
Solve the quadratic equation
x
+
5
=
−
4
x
(
2
,
-7
)
(
2
,
-5
)
(
0
,
-5
)
(
0
,
-4
)
(
-1
,
-4
)
Question
2
2.
Find the roots of the quadratic equation
(
x
2
−
11
x
+
30
)
=
0
(
8
,
2
)
(
7
,
4
)
(
8
,
4
)
(
6
,
5
)
(
7
,
5
)
Question
3
3.
Solve :
18
x
2
+
9
a
b
x
+
a
2
b
2
= 0
−
a
b
8
,
−
a
b
4
−
a
b
2
,
−
2
a
b
3
−
a
b
6
,
−
a
b
3
−
a
b
4
,
−
a
b
2
a
b
6
,
0
Question
4
4.
Find the roots of the quadratic equation
(
12
x
2
+
16
x
−
16
)
=
0
(
2
5
,
-2
)
(
2
5
,
-3
)
(
2
3
,
-2
)
(
4
3
,
-3
)
(
4
3
,
-4
)
Question
5
5.
Find the roots of the quadratic equation
(
x
2
+
11
x
+
28
)
=
0
(
-3
,
-8
)
(
-2
,
-9
)
(
-3
,
-7
)
(
-4
,
-7
)
(
-2
,
-8
)
Question
6
6.
Find the roots of the quadratic equation
(
18
x
2
+
3
x
−
15
)
=
0
(
7
6
,
-2
)
(
5
8
,
-2
)
(
7
6
,
-4
)
(
5
8
,
-1
)
(
5
6
,
-1
)
Question
7
7.
Solve :
−
2
(
−
x
−
2
)
−
5
(
x
−
2
)
=
−
5
(
−
2
)
,
2
(
−
2
√
4
)
,
2
√
4
(
−
2
√
3
)
,
2
√
3
(
−
2
√
2
)
,
2
√
2
(
−
2
√
5
)
,
2
√
5
Question
8
8.
Solve :
(
x
+
3
)
(
x
−
1
)
=
(
x
+
10
)
(
x
+
4
)
(
14
,
13
)
(
11
,
11
)
(
-11
,
-11
)
(
10
,
10
)
(
9
,
8
)
Question
9
9.
Find the discriminant of the quadratic equation
(
x
2
−
1
)
=
0
3
6
1
4
5
Question
10
10.
Solve :
−
4
(
−
x
+
5
)
+
1
(
x
+
1
)
=
4
(
x
−
5
)
5
√
5
,
5
√
5
5
√
3
,
5
√
3
5
√
4
,
5
√
4
5
,
5
5
√
2
,
5
√
2
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