Teacher's Guide - Pearson

Homework Exercise (Student’s Book page 40)Yes. (2 2 ) 3 5 64, but ​2​ (23 )​5 2 8 5 256. The correct answer is 64.Support Activity 3.1 (Student’s Book page 41)1. 3 2. 10 3. 8 4. 5Activity 3.2 (Student’s Book page 41)1. a) 3 b) 10 c)4__d) 29e) 10 f) 4 g) 1 000 h) 8i) 52. a) Undefinedb) Defined: ​ 3 √ ____28 ​ 5 3 ​√ ______(22) 3 ​ 5 22c) Defined: ​ 3 √ _____216 ​ 22.523. a) False: ​√ _______9 1 16 ​ 5 ​√ ___25 ​ 5 5 3 1 4; square and add first, then find the squareroot.b) True: ​√ _______9 1 16 ​ 5 ​√ ____144 ​ 5 12 5 3 3 4Exercise 3.1 (Student’s Book page 42)1. a) x1​ __ ​ 2__ 5​ ​ 3b) ac) 6x 4d) 2a 3 b 2e) ​3​ 9x3 ​or ​27​ 3x3 ​f) Stays unchanged.2. a) 3 √ __a 2 ​b) 3​ 5 √ __x 3 ​c) 4x 2d) a 2e) 3​ 5 √ __x 2 ​f) 8Exercise 3.2 (Student’s Book page 43)1. a) 27b) 32c) 32a 10d) 9a 22. a) 5 ​√ __4 ; 4 ​√ __3 ​ ​b) ​ 3 √ __7 ; 4 ​√ ___12 ​ ​; ​√ __3 ​Chapter 3: Indices13