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
+
2
)
)
2
−
11
(
x
(
x
+
2
)
)
+
24
= 0
(i)
-2
,
0
(ii)
(
-20
9
)
,
-2
(iii)
(
-16
7
)
,
-3
(iv)
(
-18
7
)
,
-6
(v)
(
-12
5
)
,
-4
Question
2
2.
Solve :
√
(
x
+
9
)
=
(
x
−
5
)
(i)
(
11
2
+
1
2
√
114
)
,
(
11
2
−
1
2
√
114
)
(ii)
(
11
2
√
5
+
1
2
√
57
)
,
(
11
2
√
5
−
1
2
√
57
)
(iii)
(
11
2
√
4
+
1
2
√
57
)
,
(
11
2
√
4
−
1
2
√
57
)
(iv)
(
11
2
+
1
2
√
171
)
,
(
11
2
−
1
2
√
171
)
(v)
(
11
2
+
1
2
√
57
)
,
(
11
2
−
1
2
√
57
)
Question
3
3.
Solve :
√
(
4
x
2
+
20
x
−
56
)
=
(
x
−
3
)
(i)
(
−
13
3
√
5
−
2
3
√
91
)
,
(
−
13
3
√
5
+
2
3
√
91
)
(ii)
(
−
13
3
−
2
3
√
273
)
,
(
−
13
3
+
2
3
√
273
)
(iii)
(
−
13
3
−
2
3
√
91
)
,
(
−
13
3
+
2
3
√
91
)
(iv)
(
−
13
3
−
2
3
√
182
)
,
(
−
13
3
+
2
3
√
182
)
(v)
(
−
13
3
√
4
−
2
3
√
91
)
,
(
−
13
3
√
4
+
2
3
√
91
)
Question
4
4.
Solve :
1
(
−
x
−
5
)
+
5
(
−
x
−
3
)
=
3
(i)
(
−
5
√
3
)
,
(
−
3
√
3
)
(ii)
(
−
5
√
4
)
,
(
−
3
√
4
)
(iii)
(
−
5
√
5
)
,
(
−
3
√
5
)
(iv)
(
−
5
√
2
)
,
(
−
3
√
2
)
(v)
(
−
5
)
,
(
−
3
)
Question
5
5.
Solve :
−
2
(
x
−
4
)
+
5
(
x
−
5
)
=
4
(
x
−
1
)
(i)
(
23
2
−
1
2
√
249
)
,
(
23
2
+
1
2
√
249
)
(ii)
(
23
2
−
1
2
√
498
)
,
(
23
2
+
1
2
√
498
)
(iii)
(
23
2
−
1
2
√
747
)
,
(
23
2
+
1
2
√
747
)
(iv)
(
23
2
√
5
−
1
2
√
249
)
,
(
23
2
√
5
+
1
2
√
249
)
(v)
(
23
2
√
4
−
1
2
√
249
)
,
(
23
2
√
4
+
1
2
√
249
)
Question
6
6.
Solve :
8
√
7
x
2
−
39
x
+
4
√
7
=
0
(i)
√
28
8
,
4
√
4
√
7
(ii)
√
7
8
,
4
√
28
(iii)
√
7
8
,
4
√
7
(iv)
√
7
8
√
4
,
4
√
28
(v)
√
28
8
,
4
√
7
Question
7
7.
Solve :
−
27
x
2
−
6
√
14
x
+
14
=
0
(i)
√
56
(
−
3
)
,
√
14
9
(ii)
√
56
(
−
3
)
,
√
56
9
(iii)
√
14
(
−
3
)
,
√
14
9
(iv)
√
14
(
−
3
)
,
√
14
9
√
4
(v)
√
14
(
−
3
√
4
)
,
√
14
9
√
4
Question
8
8.
Solve :
11
x
2
−
8
√
11
x
+
15
=
0
(i)
3
√
11
,
5
√
44
(ii)
3
√
11
,
5
√
11
(iii)
3
√
4
√
11
,
5
√
11
(iv)
3
√
4
√
11
,
5
√
4
√
11
(v)
3
√
44
,
5
√
44
Question
9
9.
Solve :
x
2
+
14
x
+
36
=
0
(i)
(
−
7
√
4
+
√
13
)
,
(
−
7
√
4
−
√
13
)
(ii)
(
−
7
+
√
13
)
,
(
−
7
−
√
13
)
(iii)
(
−
7
√
5
+
√
13
)
,
(
−
7
√
5
−
√
13
)
(iv)
(
−
7
+
√
39
)
,
(
−
7
−
√
39
)
(v)
(
−
7
+
√
26
)
,
(
−
7
−
√
26
)
Question
10
10.
Find the roots of the quadratic equation correct to two decimal places
(
72
x
2
+
41
x
+
4
)
=
0
(i)
6.88 , 6.56
(ii)
1.88 , 1.56
(iii)
-0.12 , -0.44
(iv)
7.88 , 7.56
(v)
0.88 , 0.56
Assignment Key
1) (iii)
2) (v)
3) (iii)
4) (v)
5) (i)
6) (iii)
7) (iii)
8) (ii)
9) (ii)
10) (iii)
