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
+
8
(
x
(
x
+
3
)
)
+
15
= 0
(i)
(
-11
4
)
,
(
-7
2
)
(ii)
(
-9
4
)
,
(
-5
2
)
(iii)
(
-13
6
)
,
(
-9
4
)
(iv)
(
-5
2
)
,
-3
(v)
(
-7
4
)
,
(
-3
2
)
Question
2
2.
Solve :
√
(
4
x
+
8
)
=
(
x
−
2
)
(i)
(
4
+
2
√
15
)
,
(
4
−
2
√
15
)
(ii)
(
4
+
2
√
5
)
,
(
4
−
2
√
5
)
(iii)
(
4
√
4
+
2
√
5
)
,
(
4
√
4
−
2
√
5
)
(iv)
(
4
+
2
√
10
)
,
(
4
−
2
√
10
)
(v)
(
4
√
5
+
2
√
5
)
,
(
4
√
5
−
2
√
5
)
Question
3
3.
Solve :
√
(
5
x
2
+
33
x
−
14
)
=
(
x
−
5
)
(i)
(
−
43
8
√
4
−
1
8
√
2473
)
,
(
−
43
8
√
4
+
1
8
√
2473
)
(ii)
(
−
43
8
−
1
8
√
7419
)
,
(
−
43
8
+
1
8
√
7419
)
(iii)
(
−
43
8
√
5
−
1
8
√
2473
)
,
(
−
43
8
√
5
+
1
8
√
2473
)
(iv)
(
−
43
8
−
1
8
√
4946
)
,
(
−
43
8
+
1
8
√
4946
)
(v)
(
−
43
8
−
1
8
√
2473
)
,
(
−
43
8
+
1
8
√
2473
)
Question
4
4.
Solve :
−
1
(
x
−
1
)
+
5
(
x
+
2
)
=
3
(i)
(
−
2
√
2
)
,
√
2
(ii)
(
−
2
)
,
1
(iii)
(
−
2
√
5
)
,
√
5
(iv)
(
−
2
√
4
)
,
√
4
(v)
(
−
2
√
3
)
,
√
3
Question
5
5.
Solve :
−
4
(
−
x
+
2
)
−
2
(
x
+
3
)
=
−
2
x
(i)
(
−
9
4
−
1
4
√
129
)
,
(
−
9
4
+
1
4
√
129
)
(ii)
(
−
9
4
√
4
−
1
4
√
129
)
,
(
−
9
4
√
4
+
1
4
√
129
)
(iii)
(
−
9
4
−
1
4
√
387
)
,
(
−
9
4
+
1
4
√
387
)
(iv)
(
−
9
4
−
1
4
√
258
)
,
(
−
9
4
+
1
4
√
258
)
(v)
(
−
9
4
√
5
−
1
4
√
129
)
,
(
−
9
4
√
5
+
1
4
√
129
)
Question
6
6.
Solve :
7
√
3
x
2
+
39
x
−
6
√
3
=
0
(i)
√
3
7
,
(
−
6
)
√
12
(ii)
√
12
7
,
(
−
6
√
4
)
√
3
(iii)
√
3
7
,
(
−
6
)
√
3
(iv)
√
3
7
√
4
,
(
−
6
)
√
12
(v)
√
12
7
,
(
−
6
)
√
3
Question
7
7.
Solve :
−
40
x
2
+
3
√
3
x
+
3
=
0
(i)
√
12
5
,
√
3
(
−
8
)
(ii)
√
3
5
,
√
3
(
−
8
√
4
)
(iii)
√
12
5
,
√
12
(
−
8
)
(iv)
√
3
5
√
4
,
√
3
(
−
8
√
4
)
(v)
√
3
5
,
√
3
(
−
8
)
Question
8
8.
Solve :
5
x
2
+
2
√
5
x
−
48
=
0
(i)
6
√
5
,
(
−
8
)
√
5
(ii)
6
√
4
√
5
,
(
−
8
)
√
5
(iii)
6
√
5
,
(
−
8
)
√
20
(iv)
6
√
20
,
(
−
8
)
√
20
(v)
6
√
4
√
5
,
(
−
8
√
4
)
√
5
Question
9
9.
Solve :
x
2
+
14
x
+
37
=
0
(i)
(
−
7
+
√
12
)
,
(
−
7
−
√
12
)
(ii)
(
−
7
√
5
+
√
12
)
,
(
−
7
√
5
−
√
12
)
(iii)
(
−
7
√
4
+
√
12
)
,
(
−
7
√
4
−
√
12
)
(iv)
(
−
7
+
√
24
)
,
(
−
7
−
√
24
)
(v)
(
−
7
+
√
36
)
,
(
−
7
−
√
36
)
Question
10
10.
Find the roots of the quadratic equation correct to two decimal places
(
24
x
2
−
49
x
+
15
)
=
0
(i)
2.67 , 1.38
(ii)
9.67 , 8.38
(iii)
1.67 , 0.38
(iv)
0.67 , 7.38
(v)
3.67 , 2.38
Assignment Key
1) (ii)
2) (ii)
3) (v)
4) (ii)
5) (i)
6) (iii)
7) (v)
8) (i)
9) (i)
10) (iii)
