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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Quadratic Equations
Question
1
1.
Solve :
28
x
2
a
4
b
2
−
9
x
a
2
b
−
9
= 0
3
4
a
2
b
,
−
3
7
a
2
b
1
2
a
2
b
,
−
1
3
a
2
b
3
2
a
2
b
,
−
3
5
a
2
b
5
4
a
2
b
,
−
1
7
a
2
b
1
4
a
2
b
,
−
5
7
a
2
b
Question
2
2.
Find the discriminant of the quadratic equation
(
4
x
2
−
20
x
+
25
)
=
0
0
-1
1
-3
3
Question
3
3.
Solve the quadratic equation
x
−
4
=
5
x
(
5
,
-1
)
(
6
,
-2
)
(
6
,
-1
)
(
8
,
-2
)
(
8
,
-3
)
Question
4
4.
Solve :
(
x
4
−
10
x
2
+
16
)
=
0
2
4
√
2
,
(
−
2
4
√
2
)
,
4
√
2
,
(
−
4
√
2
)
2
√
2
,
(
−
2
√
2
)
,
√
2
,
(
−
√
2
)
2
√
5
,
(
−
2
√
5
)
,
√
4
,
(
−
√
5
)
2
√
1
2
,
(
−
2
√
1
2
)
,
√
-1
,
(
−
√
-1
)
4
,
(
−
4
)
,
2
,
(
−
2
)
Question
5
5.
The sum of the roots of the quadratic equation
(
x
2
+
6
x
−
16
)
=
0
is
-7
-5
-8
-3
-6
Question
6
6.
Solve :
28
x
2
b
−
16
x
b
+
7
x
−
4
= 0
2
7
,
−
1
2
b
4
5
,
−
1
3
b
6
7
,
0
4
9
,
−
1
5
b
4
7
,
−
1
4
b
Question
7
7.
Find
a
and
b
in order that
(
x
3
+
8
x
2
)
+
(
a
x
+
b
)
may be exactly divisible by
(
x
2
−
36
)
a
=
-39
,
b
=
-290
a
=
-36
,
b
=
-288
a
=
-33
,
b
=
-285
a
=
-35
,
b
=
-287
a
=
-37
,
b
=
-289
Question
8
8.
Find the quadratic equation, the sum of whose roots is
0
and product is
(
-1
49
)
(
−
49
x
2
−
1
)
=
0
(
−
49
x
2
+
1
)
=
0
(
−
48
x
2
+
1
)
=
0
(
−
50
x
2
+
1
)
=
0
(
−
49
x
2
+
3
)
=
0
Question
9
9.
Solve :
8
x
2
b
+
4
x
b
−
2
x
−
1
= 0
−
3
4
,
1
2
b
−
5
6
,
−
1
4
b
−
1
2
,
1
4
b
−
3
8
,
1
6
b
−
1
6
,
3
4
b
Question
10
10.
Solve :
−
5
√
11
x
2
−
21
x
−
2
√
11
=
0
√
44
(
−
5
)
,
(
−
2
)
√
11
√
11
(
−
5
√
4
)
,
(
−
2
)
√
44
√
11
(
−
5
)
,
(
−
2
)
√
11
√
11
(
−
5
)
,
(
−
2
)
√
44
√
44
(
−
5
)
,
(
−
2
√
4
)
√
11
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