SOLUTION: 1-125b^3

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Question 175717: 1-125b^3
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
1%5E3-5b%5E3
:
difference of cubes formula
:
a%5E3-b%5E3=%28a-b%29%28a%5E2%2Bab%2Bb%5E2%29
:
so set a=1 and b=5b and plug it into that formula
:
%281-5b%29%281%2B5b%2B%285b%29%5E2%29
:
highlight%28%281-5b%29%281%2B5b%2B25b%5E2%29%29