How do you factor #21a - 49b -7c#?
1 Answer
Jun 24, 2016
7(3a - 7b - c)
Explanation:
In each of the 3 terms there is a common factor of 7 which can be taken out.
hence 21a - 49b - 7c = 7 (3a - 7b - c) is the factorised form
