What were the three dominate empires of the Americas?

Ancient America was home to sophisticated civilizations such as the Maya, Inca, Olmec and Aztec societies, and mysterious ruins like Chichen Itza, Teotihuacan, Serpent Mound, Tikal, Machu Picchu and the Nazca Lines.

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

i think the answer is   b.