. (2a – 4b – c) – (5a + 3b – 2c) =
(2a - 4b - c )
- (5a + 3b - 2c)
= -3a - 7b + c
The minus sign between the two sets of parentheses changes all the signs in the second group. So you have
2a - 4b - c - 5a - 3b + 2c
Then combine like terms
-3a - 7b + c
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Answers & Comments
(2a - 4b - c )
- (5a + 3b - 2c)
= -3a - 7b + c
The minus sign between the two sets of parentheses changes all the signs in the second group. So you have
2a - 4b - c - 5a - 3b + 2c
Then combine like terms
-3a - 7b + c