SOLUTION: can somebody check this? I've fixed it once but my instructor says it is still wrong. Factor Completely. If a polynomial is prime, state this. -2a^2(35a^2 + 34a - 8) -2a^2

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Question 601647: can somebody check this? I've fixed it once but my instructor says it is still wrong.
Factor Completely. If a polynomial is prime, state this.
-2a^2(35a^2 + 34a - 8)
-2a^2(35a + 14a + 20a - 8)
-2a^2(7a(5a -2) + 4(5a -2))
-2a^2(5a - 2)(7a +4)
He says that the signs are wrong and the factorization is as well?

Answer by veronica1289(7)   (Show Source): You can put this solution on YOUR website!
It's prime.
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