Describe the outer core

Explanation:

the second most dense layer of earth, second hottest, and made up mostly of liquid iron with other liquid metals.

the answer is c.

hope this : )

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