Test:
Quadratic Equations II - Ambitious
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Question 1:
Solve :
(
x
−
5
)
(
x
+
7
)
=
0
A
{
x
1
=
2
x
2
=
3
B
{
x
1
=
−
2
1
2
x
2
=
3
1
2
C
{
x
1
=
5
x
2
=
−
7
D
{
x
1
=
−
5
x
2
=
7
Question 2:
Solve:
−
3
(
x
+
1
2
)
(
x
−
1
)
=
0
A
{
x
1
=
−
2
5
x
2
=
−
1
B
{
x
1
=
−
1
x
2
=
2
C
{
x
1
=
−
3
x
2
=
−
1
3
D
{
x
1
=
−
1
2
x
2
=
1
Question 3:
Solve:
x
2
+
3
x
+
3
=
0
A
x
=
2
B
No solution
C
x
=
1
D
{
x
=
1
x
=
2
Question 4:
Solve:
x
2
+
2
x
+
1
=
0
A
x
=
1
B
x
=
−
1
C
{
x
1
=
−
1
x
2
=
1
D
x
=
−
1
2
Question 5:
Solve:
x
2
+
x
−
6
=
0
A
{
x
1
=
−
5
x
2
=
2
B
{
x
1
=
−
2
x
2
=
3
C
{
x
1
=
−
3
x
2
=
2
D
{
x
1
=
6
x
2
=
−
2
Question 6:
Solve:
3
x
2
−
4
x
+
7
=
0
A
x
=
−
3
4
B
No solution
C
{
x
1
=
−
1
3
x
2
=
4
D
x
=
2
Question 7:
Solve:
x
2
−
6
x
+
9
=
0
A
x
=
3
B
x
=
1
C
x
=
2
D
No solution
Question 8:
Solve:
x
2
+
5
x
−
14
=
0
A
No solution
B
{
x
1
=
−
6
x
2
=
5
C
{
x
1
=
−
5
x
2
=
14
D
{
x
1
=
−
7
x
2
=
2
Question 9:
Solve:
2
x
2
−
3
x
−
4
=
0
A
{
x
1
≈
2.35
x
2
≈
−
0.85
B
{
x
1
≈
1.71
x
2
≈
−
0.24
C
{
x
1
≈
1.78
x
2
≈
4.06
D
{
x
1
≈
3.11
x
2
≈
−
0.93
Question 10:
Solve:
1
3
x
2
+
1
2
x
−
1
4
=
0
A
{
x
1
≈
1.03
x
2
≈
−
2.15
B
{
x
1
≈
0.37
x
2
≈
−
1.26
C
{
x
1
≈
0.29
x
2
≈
−
0.61
D
{
x
1
≈
0.4
x
2
≈
−
1.9
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