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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Quadratic Equations
Question
1
1.
Solve :
10
x
2
+
a
b
2
x
−
3
a
2
b
4
= 0
−
a
b
2
,
3
a
b
2
4
−
3
a
b
2
5
,
3
a
b
2
6
−
a
b
2
5
,
5
a
b
2
6
−
3
a
b
2
7
,
3
a
b
2
8
−
a
b
2
,
a
b
2
6
Question
2
2.
Find
a
and
b
in order that
(
x
3
+
x
2
)
+
(
a
x
+
b
)
may be exactly divisible by
(
x
2
−
2
x
−
48
)
a
=
-52
,
b
=
-141
a
=
-53
,
b
=
-143
a
=
-56
,
b
=
-147
a
=
-55
,
b
=
-145
a
=
-54
,
b
=
-144
Question
3
3.
Solve :
6
x
2
a
2
+
x
a
−
1
= 0
1
2
a
,
−
1
a
2
3
a
,
1
2
a
1
4
a
,
−
1
4
a
2
6
a
,
−
1
2
a
0
,
−
3
2
a
Question
4
4.
Solve :
x
2
−
8
x
+
9
=
0
(
4
+
√
7
)
,
(
4
−
√
7
)
(
4
√
5
+
√
7
)
,
(
4
√
5
−
√
7
)
(
4
√
4
+
√
7
)
,
(
4
√
4
−
√
7
)
(
4
+
√
21
)
,
(
4
−
√
21
)
(
4
+
√
14
)
,
(
4
−
√
14
)
Question
5
5.
Solve :
27
x
2
−
18
a
x
−
24
x
+
16
a
= 0
2
a
,
8
7
2
a
3
,
8
9
2
a
5
,
8
11
0
,
2
3
4
a
3
,
10
9
Question
6
6.
Find the quadratic equation with roots
(
9
2
,
7
5
)
(
10
x
2
−
59
x
+
63
)
=
0
(
10
x
2
−
63
x
+
81
)
=
0
(
2
x
2
−
11
x
+
9
)
=
0
(
5
x
2
−
52
x
+
63
)
=
0
(
10
x
2
−
49
x
+
49
)
=
0
Question
7
7.
Find the roots of the quadratic equation
(
42
x
2
+
4
x
−
6
)
=
0
(
1
,
(
-3
5
)
)
(
1
3
,
(
-3
7
)
)
(
1
,
(
-5
7
)
)
(
1
5
,
(
-3
7
)
)
(
1
5
,
(
-3
5
)
)
Question
8
8.
Find the roots of the quadratic equation
(
x
2
−
15
x
+
54
)
=
0
(
10
,
5
)
(
9
,
6
)
(
11
,
4
)
(
11
,
5
)
(
10
,
6
)
Question
9
9.
Solve :
15
x
2
+
6
x
+
10
x
b
+
4
b
= 0
0
,
−
b
3
−
2
5
,
−
2
b
3
−
4
5
,
−
b
−
2
7
,
−
b
2
−
2
3
,
−
b
Question
10
10.
Find the discriminant of the quadratic equation
(
x
2
−
10
x
+
25
)
=
0
2
-3
0
1
-1
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