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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Quadratic Equations
Question
1
1.
If
p
and
q
are the roots of
(
x
2
+
15
x
+
54
)
=
0
,
find the equation whose roots are
p
+
1
q
and
q
+
1
p
(
66
x
2
+
1007
x
+
3685
)
=
0
(
36
x
2
+
553
x
+
2035
)
=
0
(
18
x
2
+
281
x
+
1045
)
=
0
(
54
x
2
+
825
x
+
3025
)
=
0
(
54
x
2
+
813
x
+
2915
)
=
0
Question
2
2.
Find
a
and
b
in order that
(
x
3
+
2
x
2
)
+
(
a
x
+
b
)
may be exactly divisible by
(
x
2
−
3
x
−
54
)
a
=
-68
,
b
=
-269
a
=
-70
,
b
=
-271
a
=
-66
,
b
=
-268
a
=
-71
,
b
=
-272
a
=
-69
,
b
=
-270
Question
3
3.
Solve :
(
x
(
x
+
3
)
)
2
+
18
(
x
(
x
+
3
)
)
+
81
= 0
(
-23
8
)
,
(
-23
8
)
(
-29
10
)
,
(
-29
10
)
(
-5
2
)
,
(
-5
2
)
(
-31
12
)
,
(
-31
12
)
(
-27
10
)
,
(
-27
10
)
Question
4
4.
Solve :
(
x
4
−
7
x
2
+
10
)
=
0
√
3
,
(
−
√
3
)
,
√
1
2
,
(
−
√
1
2
)
√
5
,
(
−
√
5
)
,
√
2
,
(
−
√
2
)
√
7
,
(
−
√
8
)
,
√
4
,
(
−
√
4
)
5
,
(
−
5
)
,
2
,
(
−
2
)
4
√
5
,
(
−
4
√
5
)
,
4
√
2
,
(
−
4
√
2
)
Question
5
5.
Solve :
6
x
2
−
3
a
x
+
2
x
−
a
= 0
3
a
2
,
1
3
−
a
2
,
−
1
a
4
,
−
1
5
a
,
−
1
a
2
,
−
1
3
Question
6
6.
Solve :
45
x
2
−
14
√
3
x
+
3
=
0
√
12
9
,
√
3
5
√
3
9
√
4
,
√
3
5
√
4
√
3
9
,
√
3
5
√
12
9
,
√
12
5
√
3
9
,
√
3
5
√
4
Question
7
7.
Find the quadratic equation, the sum of whose roots is
(
-5
4
)
and product is
25
64
(
64
x
2
+
83
x
+
25
)
=
0
(
63
x
2
+
80
x
+
25
)
=
0
(
64
x
2
+
77
x
+
25
)
=
0
(
65
x
2
+
80
x
+
25
)
=
0
(
64
x
2
+
80
x
+
25
)
=
0
Question
8
8.
Find the discriminant of the quadratic equation
(
5
x
2
+
29
x
+
20
)
=
0
442
443
439
441
440
Question
9
9.
Solve :
9
x
2
a
+
3
x
+
3
x
a
+
1
= 0
−
1
3
a
,
−
1
3
−
5
9
a
,
−
5
9
−
1
9
a
,
−
1
9
−
3
7
a
,
−
3
7
−
3
11
a
,
−
3
11
Question
10
10.
Solve :
10
x
2
−
5
x
+
2
x
b
−
b
= 0
1
3
,
−
b
7
1
,
b
5
1
,
−
b
3
0
,
−
3
b
5
2
4
,
−
b
5
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