SOLUTION: Can you factor 7a^3 + 28a?

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Question 780299: Can you factor 7a^3 + 28a?
Found 2 solutions by solver91311, stanbon:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!



The first term has one factor of 7 and 3 factors of a. The second term has two factors of 2, one factor of 7, and one factor of a. One factor of 7 and one factor of a are common, so:



is the complete factorization over the real numbers.




is the complete factorization over the complex numbers.

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Can you factor 7a^3 + 28a?
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Common factor:: 7a
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= 7a(a^2+4)
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If you allowed to factor over the complex numbers you get:
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= 7a(a+2i)(a-2i)
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Cheers,
Stan H.
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