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Factoring Problem

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Master | Next Rank: 500 Posts
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by student22 » Wed Apr 14, 2010 12:50 pm
I'm almost embarrassed to be posting this since I'm sure the solution is very easy, but for some reason I can't factor this:


I uploaded a screenshot to make it easier to understand. I solved it using picking numbers, but for some reason the factoring stumped me.

Image

OA:D
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by harshavardhanc » Wed Apr 14, 2010 1:08 pm
student22 wrote:I'm almost embarrassed to be posting this since I'm sure the solution is very easy, but for some reason I can't factor this:


I uploaded a screenshot to make it easier to understand. I solved it using picking numbers, but for some reason the factoring stumped me.

Image

OA:D
-x+2 can be re-written as - 1*(x-2). Now take (x-2) common from the numerator and remove it from the picture! ;)
Regards,
Harsha
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by student22 » Wed Apr 14, 2010 1:22 pm
Awesome, thanks!

For the life of me, I couldn't figure out how to rewrite that second part.
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by pops » Wed Apr 14, 2010 9:42 pm
before trying anything one quick way to find the answer is putting x=1... if not all it will help eliminate most of the answers, then try x=0 or -1
in this case x=1 eliminate all except D :)
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by student22 » Thu Apr 15, 2010 7:46 am
Yep, that's what I did on this one. But I still had some time left on that question, so I tried to solve it algebraically.
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