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 Post subject: Help! Basic Algebra??
PostPosted: Wed May 05, 2010 7:23 pm 
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Joined: Thu Nov 12, 2009 7:51 pm
Posts: 68
Location: CORNWALL
Oh no.... Can anyone please help? DC is trying to complete homework and I haven't a clue.....
How do you simplify:

4a + 3b - 2c + 3a -b + c =



:?


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 Post subject:
PostPosted: Wed May 05, 2010 7:31 pm 
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Location: CORNWALL
sorry... panic over... DC knows what she's doing even if I haven't a clue!
phew.


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 Post subject:
PostPosted: Wed May 05, 2010 7:41 pm 
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Joined: Fri Oct 12, 2007 12:42 pm
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Location: Chelmsford and pleased
For the future you collect all the like terms together:

4a + 3b - 2c + 3a -b + c =

4a + 3a = 7a

3b - b = 2b

-2c + c = -c

So the answer would be

7a + 2b -c


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 Post subject:
PostPosted: Wed May 05, 2010 7:57 pm 
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Joined: Thu Nov 12, 2009 7:51 pm
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Location: CORNWALL
Thanks moved! Must find some time to get my head around algebra :roll:


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 Post subject:
PostPosted: Wed May 05, 2010 8:02 pm 
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Joined: Fri Oct 12, 2007 12:42 pm
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Location: Chelmsford and pleased
Using the letters for objects does help.

4 aardvarks + 3 aardvarks

3 beetles - 1 beetle

-2 crabs + 1 crab


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 Post subject:
PostPosted: Wed May 05, 2010 8:56 pm 
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Joined: Sat Feb 21, 2009 6:16 pm
Posts: 2113
moved wrote:
Using the letters for objects does help.

4 aardvarks + 3 aardvarks

3 beetles - 1 beetle

-2 crabs + 1 crab


I like that. :D


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 Post subject:
PostPosted: Fri May 07, 2010 4:06 pm 
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Joined: Tue Jan 01, 2008 1:05 pm
Posts: 515
Chelmsford mum wrote:
moved wrote:
Using the letters for objects does help.

4 aardvarks + 3 aardvarks

3 beetles - 1 beetle

-2 crabs + 1 crab


I like that. :D


Or try apples bananas carrots etc. Tescos dont sell aardvarks. And they stay where they are put on the table.


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 Post subject:
PostPosted: Sun May 16, 2010 7:59 am 
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Joined: Tue Jun 02, 2009 9:28 pm
Posts: 2439
:D :D :D


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 Post subject:
PostPosted: Sun May 16, 2010 11:33 am 
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Joined: Tue Oct 27, 2009 8:19 pm
Posts: 6257
Dad of Kent and Moved - why oh why weren't you my maths teachers! It would have been so much more fun.

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Knowledge is knowing that a tomato is a fruit, wisdom is not putting it in a fruit salad !


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