SOLUTION: 28x to the second power + 21x = ? & Is the polynomial prime?

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Question 395428: 28x to the second power + 21x = ? & Is the polynomial prime?
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
28x%5E2%2B21x Is this a prime polynomial? No! It can be factored.
28x%5E2%2B21x+=+7x%284x%2B3%29