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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Quadratic Equations
Question
1
1.
Solve :
5
(
x
−
3
)
+
4
(
x
−
5
)
=
2
(
x
+
4
)
(
−
15
14
√
5
+
1
14
√
5209
)
,
(
−
15
14
√
5
−
1
14
√
5209
)
(
−
15
14
+
1
14
√
5209
)
,
(
−
15
14
−
1
14
√
5209
)
(
−
15
14
+
1
14
√
15627
)
,
(
−
15
14
−
1
14
√
15627
)
(
−
15
14
√
4
+
1
14
√
5209
)
,
(
−
15
14
√
4
−
1
14
√
5209
)
(
−
15
14
+
1
14
√
10418
)
,
(
−
15
14
−
1
14
√
10418
)
Question
2
2.
Solve :
12
x
2
−
8
a
b
2
x
+
a
2
b
4
= 0
a
b
2
6
,
4
a
b
2
8
−
a
b
2
6
,
a
b
2
4
a
b
2
4
,
2
a
b
2
3
a
b
2
2
,
3
a
b
2
4
a
b
2
8
,
2
a
b
2
5
Question
3
3.
Find
a
and
b
in order that
(
x
3
+
6
x
2
)
+
(
a
x
+
b
)
may be exactly divisible by
(
x
2
+
9
x
+
8
)
a
=
-18
,
b
=
-23
a
=
-20
,
b
=
-25
a
=
-17
,
b
=
-21
a
=
-19
,
b
=
-24
a
=
-22
,
b
=
-27
Question
4
4.
Find the quadratic equation, the sum of whose roots is
1
and product is
1
4
(
3
x
2
−
4
x
+
1
)
=
0
(
4
x
2
−
6
x
+
1
)
=
0
(
4
x
2
−
2
x
+
1
)
=
0
(
5
x
2
−
4
x
+
1
)
=
0
(
4
x
2
−
4
x
+
1
)
=
0
Question
5
5.
Solve :
4
x
2
a
4
b
2
−
4
x
a
2
b
+
1
= 0
−
1
2
a
2
b
,
−
1
2
a
2
b
1
a
2
b
,
1
a
2
b
3
2
a
2
b
,
3
2
a
2
b
1
4
a
2
b
,
1
4
a
2
b
1
2
a
2
b
,
1
2
a
2
b
Question
6
6.
Find the discriminant of the quadratic equation
(
−
20
x
2
−
2
x
+
6
)
=
0
484
487
483
485
482
Question
7
7.
Find the quadratic equation whose roots are
(
2
−
9
√
7
)
and
(
2
+
9
√
7
)
(
2
x
2
−
4
x
−
563
)
=
0
(
x
2
−
7
x
−
563
)
=
0
(
x
2
−
2
x
−
563
)
=
0
(
−
4
x
−
563
)
=
0
(
x
2
−
4
x
−
563
)
=
0
Question
8
8.
Find the quadratic equation, the sum of whose roots is
-16
and product is
64
(
x
2
+
18
x
+
64
)
=
0
(
x
2
+
16
x
+
64
)
=
0
(
2
x
2
+
16
x
+
64
)
=
0
(
x
2
+
13
x
+
64
)
=
0
(
16
x
+
64
)
=
0
Question
9
9.
Solve :
64
x
2
a
2
+
48
x
a
−
7
= 0
−
9
8
a
,
−
1
8
a
−
7
8
a
,
1
8
a
−
7
6
a
,
1
6
a
−
7
10
a
,
1
10
a
−
5
8
a
,
3
8
a
Question
10
10.
Solve :
8
x
2
b
2
+
10
x
b
+
3
= 0
−
3
5
b
,
−
1
4
b
−
1
b
,
−
3
2
b
−
1
b
,
−
1
b
−
1
2
b
,
1
2
b
−
3
4
b
,
−
1
2
b
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