SOLUTION: Can you please show the steps please Factor: 19) 125x³+8 20) 3r²-27r

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Question 176863: Can you please show the steps please
Factor:

19) 125x³+8

20) 3r²-27r
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
5x%5E3%2B2%5E3so we just use the sum of the cubes formula with one term being
:
5x and the other being 2
:
highlight%28%285x%2B2%29%2825x%5E2-10x%2B4%29%29
:
3r%5E2-27r
:
highlight%283r%28r-9%29%29