6 + 2x + 3x^3 - x^4 = - (x^4 - 3x^3 - 2x - 6)
Given 6 + 2x + 3x3 - x4, how would I rearrange it into descending order to be factored? I know addition is commutative, but given that x4 is negative, how do I move that without changing the expression?
Thanks! Any chance you could explain how to factor 5x3 - 40? -40 isn't a perfect cube, so I'm feeling lost. This is what I get for missing a lecture I guess.
EDIT: Nevermind. Factor out a five to get x3 - 8, which is a difference of cubes. It's always the little things, lol.