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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade VIII - Quadratic Equations
Question
1
1.
Find the roots of the quadratic equation
(
45
x
2
−
51
x
+
12
)
=
0
(
4
5
,
1
3
)
(
4
7
,
1
3
)
(
6
5
,
1
)
(
4
7
,
1
)
(
6
5
,
(
-1
3
)
)
Question
2
2.
Solve :
(
x
+
10
)
(
x
+
3
)
=
(
3
x
+
6
)
(
2
x
+
4
)
(
-2
,
11
)
(
-4
,
8
)
(
0
,
13
)
(
2
,
-11
)
(
-3
,
10
)
Question
3
3.
Solve :
28
x
2
−
13
a
b
x
−
6
a
2
b
2
= 0
−
4
a
b
7
,
a
b
4
−
2
a
b
9
,
a
b
2
−
2
a
b
5
,
3
a
b
2
−
2
a
b
7
,
3
a
b
4
0
,
5
a
b
4
Question
4
4.
Solve :
3
(
−
x
+
1
)
−
1
(
−
x
)
=
5
(
x
−
3
)
(
5
7
−
1
7
√
138
)
,
(
5
7
+
1
7
√
138
)
(
5
7
−
1
7
√
46
)
,
(
5
7
+
1
7
√
46
)
(
5
7
−
1
7
√
92
)
,
(
5
7
+
1
7
√
92
)
(
5
7
√
4
−
1
7
√
46
)
,
(
5
7
√
4
+
1
7
√
46
)
(
5
7
√
5
−
1
7
√
46
)
,
(
5
7
√
5
+
1
7
√
46
)
Question
5
5.
Solve :
(
x
−
6
)
(
x
−
10
)
+
(
x
−
2
)
(
x
−
8
)
=
68
15
(
154
17
,
12
)
(
170
19
,
13
)
(
168
19
,
10
)
(
62
7
,
14
)
(
172
19
,
16
)
Question
6
6.
Solve the quadratic equation
x
+
2
=
3
x
(
1
,
-3
)
(
3
,
-5
)
(
2
,
-4
)
(
2
,
-3
)
(
3
,
-4
)
Question
7
7.
Find the roots of the quadratic equation
(
18
x
2
−
2
x
)
=
0
(
1
11
,
-1
)
(
1
3
,
-2
)
(
1
11
,
0
)
(
1
3
,
-1
)
(
1
9
,
0
)
Question
8
8.
Solve :
3
(
x
+
5
)
−
3
x
=
−
2
3
,
(
−
5
√
4
)
1
,
(
−
5
√
2
)
(
−
3
)
,
(
−
5
√
5
)
0
,
(
−
5
)
(
−
1
)
,
(
−
5
√
3
)
Question
9
9.
Find the roots of the quadratic equation
(
x
2
+
8
x
+
12
)
=
0
(
0
,
-7
)
(
-1
,
-7
)
(
-1
,
-6
)
(
-2
,
-6
)
(
0
,
-8
)
Question
10
10.
Find the roots of the quadratic equation
(
x
2
−
10
x
+
9
)
=
0
(
12
,
0
)
(
12
,
-1
)
(
9
,
1
)
(
10
,
0
)
(
10
,
1
)
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