Why is world war 1 significant?

Explanation:

The reason why world war 1 was so significant is beacuse was one of the great watersheds of the 20th century.

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