Answer:
A and B.
Step-by-step explanation:
The original expression is 3x+2(x-1)-4, so let's simplify it to obtain an equivalent expression:
First we destroy the parenthesis applying distributive property:
3x+2x-2-4, so option A is correct.
Then, add the similar terms (3x can be added with 2x and -2 can be added with -4):
5x-6, so option B is also correct.
C is not correct because 3(x-4) = 3x-12 ≠ 5x-6.
D is not correct because 3(x + 2) - 6 = 3x+6-6 = 3x ≠ 5x-6.
E is not correct because 6(x - 1) = 6x-6 ≠ 5x-6.
Then, correct options are A and B.
