6.4 ANSWERS supporting path
Answers
a) 5a . 2b
= 10ab
b) 7b . 9b
= 63b2
c) 18y . 0 . 3b
= 0 . 3b
= 0
d) -s . u
= -su
e) 3a + 7a
= 10a
f) 10pq + pq
= 11pq
g) 5ab + 6a + 7b + 3ab + 2a
= 8a + 8ab + 7b
(order doesn't matter)
h) 5gh . g . 4 . a
= 20ag2h
i) 6a + 7 . 2a - 5
= 6a + 14a - 5
= 20a - 5