Question

Q1. Simplify combining like terms:
(i) 21b -32 + 7b- 206
(ii) p – (p – q) – q – (q – p)
(iii) 3a – 2b — ab – (a – b + ab) + 3ab + 6 – a

Answer 1

Answer:

21b+7b-32-206

=28b-238

Answer 2

Answer:

1. 28b - 238

2. -3p -3q

3. 3a - 3b + 4ab + 6

Explaination:

i) 21b - 32 + 7b - 206

=> 21b +7b -32 - 206

=> 28b - 238

ii) p - ( p - q ) - q - ( q - p )

removing brackets, we get

=> p - p - q - q - q - p

=> p - p - p - q - q - q

=> -3p -3q

iii) 3a - 2b - ab - ( a - b + 2ab ) + 3ab + 6 - a

=> 3a + a - a - 2b - b - ab + 2ab + 3ab + 6

=> 3a - 3b + 4ab + 6