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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade X - Quadratic Equations
Question
1
1.
Solve :
12
x
2
+
11
b
x
+
2
b
2
= 0
−
2
b
3
,
−
b
4
−
2
b
5
,
−
b
6
0
,
b
4
−
4
b
3
,
−
3
b
4
−
2
b
,
−
b
2
Question
2
2.
Solve :
20
x
2
a
4
+
7
b
x
a
2
−
6
b
2
= 0
0
,
−
5
b
4
a
2
4
b
5
a
2
,
−
b
4
a
2
2
b
7
a
2
,
−
b
2
a
2
2
b
3
a
2
,
−
3
b
2
a
2
2
b
5
a
2
,
−
3
b
4
a
2
Question
3
3.
Find the roots of the quadratic equation
(
72
x
2
−
15
x
−
3
)
=
0
(
1
5
,
(
-1
8
)
)
(
1
3
,
(
-1
8
)
)
(
1
,
(
-3
8
)
)
(
1
5
,
(
-1
6
)
)
(
1
,
(
-1
6
)
)
Question
4
4.
The sum of the squares of two consecutive odd numbers is 34. Find the numbers
0
,
2
or
0
,
(-2)
2
,
4
or
(-2)
,
(-4)
4
,
6
or
(-4)
,
(-6)
3
,
5
or
(-3)
,
(-5)
6
,
7
or
(-6)
,
(-7)
Question
5
5.
Factorize
(
100
x
2
−
81
)
(
10
x
+
9
)
(
10
x
+
9
)
(
10
x
+
9
)
(
10
x
−
9
)
(
10
x
−
9
)
(
10
x
−
9
)
(
10
x
+
27
)
(
10
x
−
3
)
(
10
x
−
27
)
(
10
x
+
3
)
Question
6
6.
Find the roots of the quadratic equation
(
49
x
2
−
14
x
−
8
)
=
0
(
4
7
,
(
-2
7
)
)
(
6
7
,
(
-2
5
)
)
(
6
7
,
(
-4
7
)
)
(
4
9
,
(
-2
7
)
)
(
4
9
,
(
-2
5
)
)
Question
7
7.
If
a
x
2
+
b
x
+
c
is exactly divisible by
(
x
+
1
)
,
(
x
−
3
)
and leaves a remainder of
96
when divided by
(
x
+
9
)
, find
a
,
b
and
c
a
=
1
,
b
=
-4
,
c
=
-6
a
=
1
,
b
=
0
,
c
=
-1
a
=
1
,
b
=
-1
,
c
=
-2
a
=
1
,
b
=
-2
,
c
=
-3
a
=
1
,
b
=
-3
,
c
=
-4
Question
8
8.
Solve :
(
x
(
x
+
3
)
)
2
+
10
(
x
(
x
+
3
)
)
+
16
= 0
-3
,
-4
0
,
-2
-1
,
(
-12
5
)
-2
,
(
-8
3
)
-4
,
(
-10
3
)
Question
9
9.
Solve :
(
x
+
3
)
(
x
+
4
)
(
x
+
5
)
(
x
+
6
)
=
24
(
−
1
)
,
(
−
6
)
(
−
4
)
,
(
−
10
)
(
−
2
)
,
(
−
7
)
(
−
3
)
,
(
−
8
)
0
,
(
−
5
)
Question
10
10.
Solve :
√
(
2
x
2
+
2
x
−
24
)
=
(
x
−
9
)
(
−
10
−
√
615
)
,
(
−
10
+
√
615
)
(
−
10
√
4
−
√
205
)
,
(
−
10
√
4
+
√
205
)
(
−
10
−
√
410
)
,
(
−
10
+
√
410
)
(
−
10
√
5
−
√
205
)
,
(
−
10
√
5
+
√
205
)
(
−
10
−
√
205
)
,
(
−
10
+
√
205
)
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