Let's take the example: 3(x + 2) + 2(x - 1)
Start with the first part: 3(x + 2)
We have to multiply what is outside of the bracket with the individual things inside the bracket sparately and add them together:
3 x (x) + 3 x (2)
Now SIMPLIFY to get: 3x + 6
Next part, we just do the same method:
2(x - 1) =
2 x (x) + 2 x (-1) =
2x - 2
^^^ This is always a good way to lay out your work!
Now add the two parts together:
(3x + 6) + (2x -2)
Putting the bits with 'x's in them next to each other helps:
(3x + 6) + (2x -2) =
3x + 2x + 6 - 2 =
5x + 4
We can't go any simpler than this!