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## Homework Statement

I am finding the x intercepts of 2(x^3)-6(x^2)-18x+7 . For some reason I am NOT getting it, even though its probably really easy.

## Homework Equations

## The Attempt at a Solution

I set the equation to 0 and then isolated the x's and got

-7 = 2(x^3)-6(x^2)-18x

factored out a 2x and got

-7 = 2x((x^2)-3x-9)

i tried factoring (x^2)-3x-9 and have no idea how.

can someone please explain where to go from here and how to find the zeroes, or if there is another way to do so