Beyond Mortality Co-operation

General Category => TreeHouse => Topic started by: BMC_Thunderbird on February 15, 2012, 10:33:51 PM

Title: Why is - x - = +?
Post by: BMC_Thunderbird on February 15, 2012, 10:33:51 PM

I got algebra this term and I dont have a clue on it at all  :-[ so might fail already

Anyway I have to answer an argument for next week as to why a negative multiplied by a negative is a positive.

Can anyone help please?

It has to be because of a law or something and not just because teacher said so.

Title: Re: Why is - x - = +?
Post by: BMC_Balatr0 on February 16, 2012, 11:35:29 PM

Hmmm, I don't know. -(-a)=a is one of the basic rules of algebra right ? I don't think this is something you have to prove ... at least I my algebra class, we didnt have to.

Title: Re: Why is - x - = +?
Post by: BMC_Thunderbird on February 17, 2012, 12:03:53 AM

Yup  :( But offered 5% for anyone who said they can show why and finding it hard to do  :'(.

Title: Re: Why is - x - = +?
Post by: BMC_Zeuske on February 17, 2012, 08:56:56 AM

Sorry But I'm not smart enough for that :)

Title: Re: Why is - x - = +?
Post by: BMC_Thunderbird on February 17, 2012, 11:44:27 AM

Its ok, my maths level is nursery school standard with my dyslexia