Answer:
(a - 2b)(1 - 3c)
Explanation:
Given
(a - 2b) - 3c(a - 2b) ← factor out (a - 2b) from each term
= (a - 2b)(1 - 3c)
a-2b-3ac+6cb
a(1-3c)-2b(1-3c)
(a-2b)(1-3c)
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