1. Algebra Substitution a = 3 ; b = 4 and c = -1 2a + c b2 – a2 2b2
Evaluating Expressions – number for letter
Given the following information find the values of :-
BODMAS
a = 3 ; b = 4 and c = -1
2a + c
b2 – a2
2b2
= 2x3 + (-1)
= 42 – 32
= 2x(4)2
= 2x3 - 1
= 16 – 9
= 2x16
= 6 - 1
= 7
= 32
= 5

2. Algebra Substitution 2a2 + 3b + 30c = 2x(3)2 + 3x4 + 30x(-1)
Evaluating Expressions – number for letter
Given the following information find the values of :-
a = 3 ; b = 4 and c = -1
2a2 + 3b + 30c
= 2x(3)2 + 3x4 + 30x(-1) =
= 0