Today, cholera is found in countries
a.
located along the ring of fire
b.
with low economic and social development
c.
with clean water supplies
d.
that had outbreaks before the 19th 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

boundary is what it refers to hope this

explanation: