Answer:
6m-8n-8 if factored: 2(3m-4n-4)
Step-by-step explanation:
(12m-5n-5)-(6m+3n+3)
when subtracting, we know we need to change the sign of subtrahend.
when subtracting, we know we need to change the sign of subtrahend.+ remove unnecessary parenthesis
= 12m-5n-5-6m-3n-3
+ collect like terms
= 6m- 8n - 8
