A part of a problem is to factor 8 - b^3
"8 minus b cubed"
The Attempt at a Solution
I see that the problem is 2^3 - b^3.
I don't see the next step
I know the answer is (2-b)(4+2b+b^2).
but I can't get there.
Is this just trail and error dividing terms into the polynomial or is there a more obvious solution?