My Math Forum Fundamental Laws and Precedence - John Bird

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October 5th, 2014, 09:19 AM   #1
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Fundamental Laws and Precedence - John Bird

Hi Guys, I'm currently working through John Birds Engineering Mathematics Edition 5 and I cant seem to simplify question 9 Exercise 21. I've tried several times but don't seem to be having any luck, it would be greatly appreciated if somebody could give me a little guidance.

I have attached a file containing the question.
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 Exercise 21 -Q9.jpg (19.1 KB, 1 views)

 October 5th, 2014, 09:44 AM #2 Math Team   Joined: Jul 2011 From: Texas Posts: 2,785 Thanks: 1434 $\displaystyle \frac{(x+1)(x-4)}{2x+2} = \frac{(x+1)(x-4)}{2(x+1)} = \frac{x-4}{2} \, ,\, \, x \ne -1$ Thanks from 3point141
 October 5th, 2014, 09:52 AM #3 Newbie   Joined: Oct 2014 From: England Posts: 6 Thanks: 0 Oh god, it seems so simple now, I never thought to factorise the denominator. Thank you very much for your time.

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