F.A.O.factor30

[Tilly2]

Can you help me with this, as I have forgotten.

In the context of Algebra:-

Plus+plus =plus
plus+minus =minus
minus+minus= .........................is it minus or plus?

I know I should know but........................... hey, ho.

[boxtops]

This says minus http://www.leavingcertsolutions.com/junior_cert_maths_higher_algebra.htm

[factor-fiction]

Do you mean adding or multiplying?

If you mean for example -4 + (-5) the answer is -9

[ChuckFickens]

There isn't a fixed rule for addition.

For multiplication and division it's

Positive x or / Positive = Positive
Positive x or / Negative = Negative
Negative x or /Postive = Negative
Negative x or /Negative = Positive

[factor-fiction]

Sorry if the answer was brief- I was talking on the phone at the time when i spotted your question FAO me and I typed the reply whilst talking/listening

[boxtops]

sorry I jumped in before factor too, but I was interested to know the answer!

[douglas9401]

Oh dear, this'll bring the nightmares back. :(

[Psybbo]

I first met factor by chance then we agreed to meet up...................

[factor-fiction]

Do these help?
a+b≡ a+b
a+ (-b) ≡ a-b
-a+ (-b)≡-a-b ≡-(a+b)
a- (-b) ≡ a+b

(Here I have deliberately used the identity sign ≡ rather than an = sign)

[factor-fiction]

No problem boxtops.

sibton - that was supposed to be a secret. (Actually I don't know what you are saying....)

[factor-fiction]

Oh I see sibton- a 'meet' and 'meet up with' reference. Sorry, it's been a long week

[Psybbo]

2 days - a long week? or have you had more?

[factor-fiction]

3 days now...

[Psybbo]

I think desktop needs you.......

[Tilly2]

Never mind desktop needing him. I need him to answer my maths questions otherwise I'll get fed up.

So, 3x-2 +x-5
4x-7

Is that right?

[Prudie]

In case factor's having his dinner yes it is Tilly.

[ChuckFickens]

Don't really understand "3x-2 +x-5 "

But using the rules I posted earlier (Positive*Negative=Negative) 4*-7=-28

[Psybbo]

That is right Tilly
thanks for not shouting at me

[DTCwordfan]

Your reward shall be great in AB heaven, murray...

http://littlegreen.typepad.com/.a/6a00d8352f394169e20133ed390cc1970b-320wi

At least it's not a skeleton, sibs!

[DTCwordfan]

wrong post - sorry

[factor-fiction]

Hi Tilly- yes, I endorse what you, Prudie and sibton have said.
Sibton- I keep missing some of your posts thinking your avatar is someone else's (Lankeela's?). Will you be returning to the Debbie Harry pic at some stage?