1. Algebra substitution

2. Substitution
a = 3 b = 4 c = 2
a + b + c = 3
a + b + c 4 2
= 9

3. Substitution
a = 3 b = 4 c = 2
3b + c =
3 x b + c 4 2
= 14

4. Substitution
a = 3 b = 4 c = 2
a2 + c =
a2 + c 3 2
= 9 + 2
= 11

5. Substitution a = 3 b = 4 c = 2 4a – c2 = 4 x a - c2 = 4 x 3 – 22
= 12 – 4
= 8

6. Substitution a = 3 b = 4 c = 2 ab - 2 = a x b - 2 = 4 x 3 – 2 = 12 – 2
= 10

7. Exercise 1 a = 3 b = 4 c = 2 4a + c 8. b + c a – c 2
7b – 14c (a + b)
b2 - c abc
ab + bc
ab – (10 + c)
10bc + 5b

8. Exercise 1 a = 3 b = 4 c = 2 4a + c 14 8. b + c 3 a – c 1 2
7b – 14c (a + b) 35
b2 - c abc 24
ab + bc 20
ab – (10 + c) 0
10bc + 5b 100

9. Exercise 2
a = 3 b = 4 c = 2
Find 3 different formulae to give an answer of 0
Find 3 different formulae to give an answer of 2