1
|
x = 4 or -10 |
2
|
x = 3 |
3
|
x = 0 or 8 |
4
|
x = 5.37 or x = -0.37 (to 2 d.p.) |
5
|
x = -3 +√ 2 or -3 − √2 |
6
|
x = -2 |
7
|
x = 25 |
8
|
x = 1 + √3 or 1 − √3 |
9
|
x = 0.25 |
10
|
x = 0.5 +√5/2 or 0.5 − √5/2 |
11
|
x = 5 or -5 |
12
|
x = 4 |
13
|
x = 1 |
14
|
x = -0.42 or x = -1.58 (to 2 d.p.) |
15
|
x = 0 or x = 1 |
16
|
x = 9 |
17
|
y = 1.6 |
18
|
x = 2.04 (to 2 d.p.) |
19
|
x = 2.10 (to 2 d.p.) |
20
|
x = 1.01 (to 2 d.p.) |