How did the use of aircraft affect combat in world war i?

it allowed nations to better determine the positions of their enemy.

it ultimately eliminated the need for trench warfare.

it ended the use of frontal assaults in battle.

it prolonged the course of the war.

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

1.a)britain

2.b)spain

3.c)french

4.d)portugal

explanation: