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How do I do that? I know the degree is 3, and the sign is negative...
Thanks!

no that's not the answer but thanks anyways

Does anyone else know?

using calculas .

is that ok?

It can be done without calculus.

sure

You can make a long table of values

I think a short-cut is to multiply the leading coefficient by twice the degree.

It works for this example and another that I tried, but it might not work in all cases.

-4x3x2x1

Since the degree of the function is 3 . we look at -4x^3

the 3th diferences are constant.