Which of the following theories states that humans first migrated to america by boat?
the coastal crossing theory
the land bridge theory
the ice age theory
the asia theory

norsemen from northern countries had made earlier journeys

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