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Answer:
(i)(a - 2y) (3x - 4b)
(iii) (m - n)(m + 4)
Step-by-step explanation:
(i)
3ax - 6xy + 8by - 4ab
= 3x (a - 2y) - 4b (-2y + a)
= 3x (a - 2y) - 4b (a - 2y)
= (a - 2y) (3x - 4b)
(iii)
[tex] {m}^{2} - mn + 4m - 4n \\ \\ = m(m - n) + 4(m - n) \\ \\ = (m - n)(m + 4)[/tex]