Equations Objectives for today’s lesson : Substitution Expanding brackets

Substitution a = 4, b = 2 a = 5, b = -1 3a + 2b a = 3, b = 6

Substitution a = 4, b = 2 16 a = 5, b = -1 13 3a + 2b a = 3, b = 6 21 40

Expanding Brackets Example 3(x + 4) = 3x + 12 Multiply everything in the bracket by the number outside.

Expanding Brackets Example 3(x + 4) = 3x + 12 4(x + 5) 6(2x + 4) Multiply everything in the bracket by the number outside. 4(x + 5) 6(2x + 4) 3(9x – 2) x(x + 1)

Expanding Brackets Example 3(x + 4) = 3x + 12 4(x + 5) 4x + 20 Multiply everything in the bracket by the number outside. 4(x + 5) 4x + 20 6(2x + 4) 12x + 24 3(9x – 2) 27x - 6 x(x + 1) x2 + x

Do the first column from each section. Question Practice Do the first column from each section. For the first section you have to collect ‘like terms’ together. Examples: 4a + 5a = 9a 2d – 5d = -3d