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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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October 5th, 2014, 09:44 AM   #2
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$\displaystyle \frac{(x+1)(x-4)}{2x+2} = \frac{(x+1)(x-4)}{2(x+1)} = \frac{x-4}{2} \, ,\, \, x \ne -1$
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October 5th, 2014, 09:52 AM   #3
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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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