SOLUTION: Factor. SHOW YOUR WORK FOR FULL CREDIT! 4a^3 - 20a^3 - 8a

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Question 951347: Factor. SHOW YOUR WORK FOR FULL CREDIT!
4a^3 - 20a^3 - 8a
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

4a%5E3+-20a%5E3+-8a....add terms with same exponent first
+-16a%5E3+-8a....if both terms negative, we can factor out -1
+-1%2816a%5E3+%2B8a%29.....as you can see, both terms are divisible by 8a, so factor it out
+-8a%282a%5E2+%2B1%29...your answer