Answer:
Step-by-step explanation: (2x-4)-(6x+6)
= 2x -4 - 6x - 6 [ opening brackets]
= 2x-6x -4-6 [ bringing the same variables and numbers together]
= -4x-10
=2(2x-5)
-4x-10
The 6x + 6 becomes negative due to the negative sign before the parenthesis. You then subtract 6x and 6 from 2x and -4 to get -4x-10
