The U. S. left the Vietnam war in the

In the what? is that the complete question or is  there more to it?

Explanation:

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.