Question

2x(x+4)-(x-8)

Answer 1

distributive property:
\[\rm \color{Red}{a}(b+c)=\color{red}{a}*b+\color{red}{a}*c=\color{reD}{a}b+\color{reD}{a}c\]

Answer 2

distribute parentheses by outside term
first parentheses by 2x
and 2nd parentheses by -1

Answer 3

@ceeceecantu

Answer 4

@ceeceecantu