6.4 ANSWER normal path

a) 5a 2b 

= 10ab

 

b) 7b 9b 

= 63b

 

c) 18y 3b 

= 0 

 

d) -s -p 

= -su -p 

= psu 

 

e) 3a + 7a + 101b - a

= 10a + 101b - a

= 9a + 101b

 

f) 10pq + pq . 43 - 2 

= 10pq + 43pq - 2 

= 53pq - 2

 

g) 5gh .

= 5g2

= 20g2

= 20ag2h

 

h) 6a + 7 . 2a - 5 

= 6a + 14a - 5 

= 20a - 5

 

i) 5ab + 6a + 7b + 3ab + 2a . -3b + 4a

= 5ab + 6a + 7b + 3ab - 6ab + 4a 

= 2ab + 10a + 7b 

 

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