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March 4th, 2012, 09:31 PM | #1 |
Member Joined: Feb 2012 Posts: 97 Thanks: 0 | Add and Subtract Indicated ![]() |
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March 4th, 2012, 09:39 PM | #2 | |
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4 | Re: Add and Subtract Indicated Quote:
You'll also need to multiply the first term by r/r | |
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March 4th, 2012, 09:43 PM | #3 |
Member Joined: Feb 2012 Posts: 97 Thanks: 0 | Re: Add and Subtract Indicated
It's still not coming out the right answer, ![]() |
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March 4th, 2012, 09:55 PM | #4 |
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,955 Thanks: 988 | Re: Add and Subtract Indicated
What's the "right answer"? I get: 3(r - 4) --------- 2r(r+6) ?? |
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March 4th, 2012, 09:57 PM | #5 |
Member Joined: Feb 2012 Posts: 97 Thanks: 0 | Re: Add and Subtract Indicated
That's the answer. But what do you have on the second denominator when you're multiplying?
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March 4th, 2012, 10:12 PM | #6 |
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,955 Thanks: 988 | Re: Add and Subtract Indicated
Not sure what you're asking, HB, but here's my steps: 5 / (2r + 12) - 1 / r = [5r - 1(2r + 12)] / [r(2r + 12)] = (5r - 2r - 12) / (2r^2 + 12r) = (3r - 12) / [2r(r + 6)] = [3(r - 4)] / [2r(r + 6)] Like: a/b - c/d = (ad - bc) / bd Hope that helps instead of confuses ![]() Being 7/10 bald-headed, I musy say I'm jealous of your Afro ![]() |
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March 5th, 2012, 12:25 AM | #7 |
Member Joined: Feb 2012 Posts: 97 Thanks: 0 | Re: Add and Subtract Indicated ![]() |
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