Can this trinomial be factored?

  • Thread starter Byrgg
  • Start date
  • #1
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My math teacher put up the answers from yesterday's homework, and she put DNF for one of the answers, which I'm assuming means does not factor. But I'm pretty sure I found a way to factor it, here's the trinomial:

3v^2 - 11v + 10

I factored it and came up with the following:

(3v - 5)(v - 2)

Was my teacher just wrong, or did I make a mistake?
 

Answers and Replies

  • #2
147
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well when its multiplied out it equals the same thing. maybe DNF means 'did not finish'...maybe she wanted the 3 factored out for some reason. ie: 3(v-5/3)(v-2)
 
  • #3
Hootenanny
Staff Emeritus
Science Advisor
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Nope, your factorisation looks good to me, I would agree with you that your polynomial does indeed factor as you have shown.

Edit: I need to type faster!
 
  • #4
2,063
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For the trinomial above, your answer is right.

Edit: And I need to type faster than Hoot! :biggrin:
 
  • #5
147
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that makes me the fastest!!
 
  • #6
335
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Ok, thanks for the help.

dmoravec said:
maybe DNF means 'did not finish'...maybe she wanted the 3 factored out for some reason. ie: 3(v-5/3)(v-2)
No, it wasn't my work that she put DNF on, she had an overhead screen, with all of the answers on it, and for that question, she simply put DNF.
 
  • #7
147
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well i'd have to say she is mistaken
 

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