How does document a explain the decline of the roman empire?

According to Vegetius, what led to the changes in Roman military armor and training techniques.

Explanation:

According to Vegetius the negligence and laziness which changed what they did in the army, which led to many more deaths because of no protection.

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