Math Is Fun Forum
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#1 2011-02-03 02:18:14
Factorise
Also tell me how u did it
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#2 2011-02-03 02:30:09
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Factorise
Hi;
Look at all those squares, you are going to need a p^2 = p*p, a q^2 =q*q and +5 and - 5 to make -25.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#3 2011-02-03 02:33:23
Re: Factorise
Please Elaborate!
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#4 2011-02-03 02:34:03
- Bob
- Administrator
- Registered: 2010-06-20
- Posts: 10,649
Re: Factorise
hi Agnishom
You might notice that
is in there and then use the 'difference of two squares'.
Or this diagram might help
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#5 2011-02-03 02:41:20
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Factorise
Hi Agnishom;
Takes me a lot of trial and error sometimes. Takes practice. But looking at the squares you are going to need something like this.
-( p q +5) ( p q -5)
Try filling in the blanks with plus or minus. That is how I do it.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#6 2011-02-03 03:27:36
Re: Factorise
THNX to all (equally).
(p+q+5)(p+q-5)
Is that true!
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#7 2011-02-03 03:33:36
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Factorise
There is a minus sign in front of all that!
-(p+q+5)(p+q-5)
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline