Question

distributive property
-(x + 3)

Answer 1

so the negative or minus sign indicate that there is \(-1 \times (x+3) \)

Answer 2

and distributive property has the following general pattern
\(a(b\color{red}{+} c) = (a\times b) \color{red}{+}(a \times c) \)
an example would be
\(-2(3-4) = (-2 \times 3 ) \color{red}{-}(-2 \times -4)\)