b^3-125. Use the sum of two cubes or the difference of two cubes pattern to factor the following. I have (b-5)(b^2+5b+25) But I don't know how to get there. Someone just gave me the answer. Anyone willing to tackle showing me how to arrive at the answer? Please and thank you.

Question

anonymous · Answer

$$(b^3-125) = (b-5)(b^2+5b+25)$$

anonymous · Answer

The formula I used is 

$$(a^3-b^3) = (a-b)(a^2+ab+b^2)$$

anonymous · Answer

first you're writing 125 as 5^3 then=>b^3-5^3=(b-5)(b^2+5b+25)

anonymous · Answer

Thank you both, I appreciate the input!