Answer: 3(x + 2)
Step-by-step explanation:
the expression

can be simplified, using the common factor. The common factor in the terms 3x an 6 is 3.
because 3*x=3 and
3*2=6.
So we can represent the expression as:

And now we factor the 3 out in a parenthesis:

This is the simplest form of 3x+6.