Changing the Subject / Manipulating Surds Answers

1

2
x = 2 ± √y
3

4

b = a / 3

5

t = ± √(1 − 3s2)

6

a = b / 3

7
√6 + 4√2
8
-1
9
8
10
3√5 / 5
11
2 − √ 3
12
5 + 4√2
13
x = -1
14
x = 3 or 1
15
x = 3
16
x = 1.485 ( to 4 sig. fig.)
17
x = 2.579 (to 4 sig. figs.)
18
x = 0.9827 ( to 4 sig. figs.)