To simplify this expression would be 5x + 13
To Expand this expression would be 3x + 3 + 2x + 10
3(x + 1) + 2(x + 5) use distributive property
= (3)(x) + (3)(1) + (2)(x) + (2)(5) = 3x + 3 + 2x + 10 combine like terms
= (3x + 2x) + (3 + 10) = 5x + 13