EduSahara™ Assignment
Name : Solving some complex Quadratic Equations - 2
Chapter : Quadratic Equations
Grade : ICSE Grade X
License : Non Commercial Use
Question
1
1.
Solve :
(
x
(
x
+
3
)
)
2
+
0
(
x
(
x
+
3
)
)
−
81
= 0
(i)
(
-29
8
)
,
(
-29
10
)
(ii)
(
-27
8
)
,
(
-27
10
)
(iii)
(
-25
8
)
,
(
-5
2
)
(iv)
(
-7
2
)
,
(
-23
8
)
(v)
(
-33
10
)
,
(
-31
12
)
Question
2
2.
Solve :
√
(
−
3
x
+
7
)
=
(
x
+
7
)
(i)
(
−
3
)
,
(
−
14
)
(ii)
(
−
3
√
2
)
,
(
−
14
√
2
)
(iii)
(
−
3
√
3
)
,
(
−
14
√
3
)
(iv)
(
−
3
√
5
)
,
(
−
14
√
5
)
(v)
(
−
3
√
4
)
,
(
−
14
√
4
)
Question
3
3.
Solve :
√
(
2
x
2
+
10
x
−
12
)
=
(
x
−
6
)
(i)
(
−
24
√
5
)
,
2
√
5
(ii)
(
−
24
)
,
2
(iii)
(
−
24
√
3
)
,
2
√
3
(iv)
(
−
24
√
4
)
,
2
√
4
(v)
(
−
24
√
2
)
,
2
√
2
Question
4
4.
Solve :
−
3
(
−
x
+
4
)
+
3
(
x
+
1
)
=
−
5
(i)
(
−
1
)
,
4
(ii)
(
−
√
2
)
,
4
√
2
(iii)
(
−
√
3
)
,
4
√
3
(iv)
(
−
√
4
)
,
4
√
4
(v)
(
−
√
5
)
,
4
√
5
Question
5
5.
Solve :
−
4
(
−
x
+
5
)
−
1
(
−
x
−
2
)
=
−
5
(
x
+
2
)
(i)
11
5
,
(
−
2
)
(ii)
11
5
√
2
,
(
−
2
√
2
)
(iii)
11
5
√
3
,
(
−
2
√
3
)
(iv)
11
5
√
4
,
(
−
2
√
4
)
(v)
11
5
√
5
,
(
−
2
√
5
)
Question
6
6.
Solve :
−
8
√
14
x
2
+
34
x
+
6
√
14
=
0
(i)
√
14
(
−
8
√
4
)
,
6
√
56
(ii)
√
14
(
−
8
)
,
6
√
14
(iii)
√
14
(
−
8
)
,
6
√
56
(iv)
√
56
(
−
8
)
,
6
√
14
(v)
√
56
(
−
8
)
,
6
√
4
√
14
Question
7
7.
Solve :
14
x
2
+
9
√
3
x
+
3
=
0
(i)
√
3
(
−
7
√
4
)
,
√
3
(
−
2
√
4
)
(ii)
√
12
(
−
7
)
,
√
3
(
−
2
)
(iii)
√
12
(
−
7
)
,
√
12
(
−
2
)
(iv)
√
3
(
−
7
)
,
√
3
(
−
2
√
4
)
(v)
√
3
(
−
7
)
,
√
3
(
−
2
)
Question
8
8.
Solve :
5
x
2
−
4
√
5
x
+
3
=
0
(i)
3
√
20
,
1
√
20
(ii)
3
√
4
√
5
,
1
√
5
(iii)
3
√
4
√
5
,
√
4
√
5
(iv)
3
√
5
,
1
√
5
(v)
3
√
5
,
1
√
20
Question
9
9.
Solve :
x
2
−
14
x
+
35
=
0
(i)
(
7
√
5
+
√
14
)
,
(
7
√
5
−
√
14
)
(ii)
(
7
+
√
42
)
,
(
7
−
√
42
)
(iii)
(
7
+
√
28
)
,
(
7
−
√
28
)
(iv)
(
7
√
4
+
√
14
)
,
(
7
√
4
−
√
14
)
(v)
(
7
+
√
14
)
,
(
7
−
√
14
)
Question
10
10.
Find the roots of the quadratic equation correct to two decimal places
(
8
x
2
+
18
x
+
10
)
=
0
(i)
-1.00 , -1.25
(ii)
6.00 , 5.75
(iii)
1.00 , 0.75
(iv)
7.00 , 6.75
(v)
0.00 , 6.75
Assignment Key
1) (ii)
2) (i)
3) (ii)
4) (i)
5) (i)
6) (ii)
7) (v)
8) (iv)
9) (v)
10) (i)
