How did columbuss plan for reaching Asia

How did Columbus's plan for reaching Asia differ from De Gama's? Da Gama reached Asia by sailing east around the southern tip of Africa; Columbus wanted to sail west and reach Asia directly. You just studied 13 terms!

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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