Question

how to expand a cubic

Answer 1

Pascal's triange?

Answer 2

Not quite, the equation is \[7(x-5)^3 -2\]

Answer 3

Ah, I only know the bare minimum in that category :l I'm sorry I couldn't help mate.

Answer 4

that's okay, thanks for the thought though

Answer 5

Okay: \[
(x-5)^3=(x-5)(x-5)(x-5)
\]

Answer 6

Start with: \[
(x-5)(x-5)=...
\]Then do: \[
(...)(x-5)
\]

Answer 7

I can get that part, its just the prefixes of it (the 7) that's been throwing me off

Answer 8

What did you get for the first part?

Answer 9

Multiply the 7 at the very end.

Answer 10

Oh right, Yup I got it. Thanks so much for the help!