Can this trinomial be factored?

[Byrgg]

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?

 

[dmoravec]

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)

 

[Hootenanny]

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!

 

[neutrino]

For the trinomial above, your answer is right.

Edit: And I need to type faster than Hoot!

 

[dmoravec]

that makes me the fastest!

 

[Byrgg]

Ok, thanks for the help.

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.

 

[dmoravec]

well i'd have to say she is mistaken