Teacher's Guide - Pearson

Activity 15.3 (Student’s Book page 275)1. a) 1b) x 1 2c) 24xd) x 2 1e) x 2 5f) (x 2 3)(x 2 1)g) x 2 1 2x 2 8h) (x 2 4)(x 1 1)i) (x 1 4)(x 2 1)Activity 15.4 (Student’s Book page 277)1. a) x 2 1 3x 1 3x 1 9b) x 2 2 4x 2 3x 1 12c) x 2 2 5x 1 x 2 5d) x 2 1 4x 2 2x 2 82. a) (x 1 3)(x 1 3)b) (x 2 4)(x 2 3)c) (x 2 5)(x 1 1)d) (x 1 4)(x 2 2)Exercise 15.5 (Student’s Book page 277)1. (x 1 5)(x 1 5)2. (x 1 5)(x 2 1)3. (y 1 3)(y 2 1)4. (x 1 7)(x 2 1)5. (x 2 5)(x 1 4)6. (x 2 12)(x 2 2)7. (k 2 3)(k 2 3)8. (x 2 8)(x 2 1)9. (x 2 30)(x 2 1)Exercise 15.6 (Student’s Book page 278)1. (5x 2 4)(x 1 1)2. (3a 1 1)(a 1 8)3. (2d 2 1)(d 1 3)4. (7x 2 3)(2x 1 5)5. (4y 2 5)(2y 2 3)92 EXPLORING MATHEMATICS FORM 3