SOLUTION: r^3+8 is it not factorable?

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Question 415245: r^3+8 is it not factorable?
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

(r^3 + 8) = (r^3 + 2^3)
= (r + 2) (r^2 + 2^2 - r*2)
= (r + 2) (r^2 + 4 - 2r)