Answer:
Explanation:
(a) 3ab/4c + 9b/8ac
= 3ab(8ac) + 9b(4c) / 4c(8ac)
= 24a²bc + 36bc / 32ac²
= 6a²b + 9b / 8ac
(b) 4(3b+2c)
= 4(3b) + 4(2c)
= 12b + 8c
(c) 3a+3b-ca-cb
= 3a - ca + 3b - cb
= a(3 - c) + b(3 - c)
= (a + b) (3 - c)
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