Solve the following equations:

1

(x + 3)2 = 49

2
3
4
x2 = 5x + 2
5
x2 + 6x + 7 = 0
6
7
x + √ x − 30 = 0
8
(x − 1)2 = 3
9
10
11
x2 − 25 = 0
12
(√x + 3)2 = 25
13
√x + 1/√x = 2
14
3x2 + 6x = -2
15
16
17
3y = log 2 32
18
4x = 17
19
3x+1 = 30
20
15 = 2e2x