Mathematics
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OpenStudy (anonymous):
please help! how can i simplify this fraction
5f+6-f+10
---------
(f-1)(f+8)
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OpenStudy (mertsj):
In the numerator add 5f + 1f Also add 6 + 10
OpenStudy (mertsj):
What did you get?
OpenStudy (anonymous):
4f+16
OpenStudy (mertsj):
So now we have:
\[\frac{6f+16}{(f-1)(f+8)}\]
OpenStudy (mertsj):
Now pull 2 out of 6f+16
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OpenStudy (mertsj):
Please note that 1f+5f=6f NOT 4f
OpenStudy (mertsj):
What do you get when you pull the 2 out?
OpenStudy (anonymous):
wait, but isnt it 5f-1f?
OpenStudy (mertsj):
Oh my. you are right. I thought it said plus.
OpenStudy (mertsj):
So now pull out 4 not 2
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OpenStudy (anonymous):
alright, so what does it mean by pull out?
OpenStudy (mertsj):
\[\frac{4(f+4)}{(f-1)(f+8)}\]
OpenStudy (mertsj):
It just means factor out the common factor.
OpenStudy (mertsj):
And now we see that there are no common factors so the fraction cannot be reduced so it is in simple form.
OpenStudy (anonymous):
oh right, okay. so can i simplify it any more?
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OpenStudy (anonymous):
alright! thanks so much!!
OpenStudy (mertsj):
Not the way it is stated. But I think you should double check and make sure the 10 is +10 and not -10. It it were -10, it could reduce. Please check.
OpenStudy (anonymous):
okay. yeah its +10
OpenStudy (mertsj):
ok. Good. We're done. I guess all they wanted you to do was collect the like terms in the numerator.
OpenStudy (anonymous):
yeah. thanks!
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OpenStudy (mertsj):
yw