Test:
Quadratic Equations II - Challenging
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Question 1:
Solve:
x
2
−
x
−
30
=
0
A
x
=
6
or
x
=
−
3
B
x
=
−
1
2
or
x
=
60
C
x
=
−
5
or
x
=
6
D
x
=
3
or
x
=
−
10
Question 2:
Solve:
x
2
−
8
1
2
x
+
4
=
0
A
x
=
8
or
x
=
1
2
B
x
=
4
or
x
=
1
C
x
=
2
D
x
=
16
or
x
=
1
4
Question 3:
Solve:
x
2
−
4
1
6
x
−
1
1
2
=
0
A
x
=
7
2
3
or
x
=
−
1
6
B
x
=
3
or
x
=
−
1
2
C
x
=
−
6
or
x
=
1
4
D
x
=
4
1
2
or
x
=
−
1
3
Question 4:
Solve:
6
x
2
−
5
x
−
6
=
0
A
x
=
3
4
or
x
=
−
1
1
3
B
x
=
2
or
x
=
−
3
C
x
=
−
9
6
or
x
=
6
D
x
=
1
1
2
or
x
=
−
2
3
Question 5:
Solve:
6
x
2
−
7
x
−
20
=
0
A
x
=
3
3
4
or
x
=
−
2
3
B
x
=
1
1
2
or
x
=
−
2
2
3
C
x
=
2
1
2
or
x
=
−
1
1
3
D
x
=
4
or
x
=
−
5
Question 6:
Solve:
12
x
2
+
1
6
x
−
1
6
=
0
A
x
=
1
7
or
x
=
−
1
6
B
x
=
1
9
or
x
=
−
1
8
C
x
=
1
3
or
x
=
−
1
4
D
x
=
1
2
or
x
=
−
1
3
Question 7:
Solve:
10
x
−
1
5
x
+
1
=
0
A
x
=
−
1
3
or
x
=
2
5
B
x
=
−
1
or
x
=
1
5
C
x
=
−
1
4
or
x
=
1
5
D
x
=
−
1
5
or
x
=
1
10
Question 8:
Solve:
2
x
−
2
x
−
3
=
0
A
x
=
−
1
or
x
=
2
B
x
=
−
1
2
or
x
=
2
C
x
=
−
1
or
x
=
1
D
x
=
−
1
4
or
x
=
4
Question 9:
Solve:
4
x
2
−
13
x
+
3
=
0
A
x
=
1
or
x
=
2
B
x
=
1
or
x
=
3
C
x
=
3
or
x
=
1
4
D
x
=
2
or
x
=
1
3
Question 10:
Solve:
7
x
2
−
x
−
2
7
=
0
A
x
=
14
or
x
=
−
1
7
B
x
=
2
7
or
x
=
−
1
7
C
x
=
3
14
or
x
=
−
4
7
D
x
=
7
or
x
=
−
1
14
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