Similarities across related living organisms can be explained by the concept of a. Natural selection
b. artificial selection
c. evolution
d. common descent
e. Both a and c

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

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