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# How is -4 divided by -4 = -8

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1. (Original post by NoahMal)
-4/-4 Firstly two negatives cancel out hence its 4/4 which is 1 therefore by mathematical induction it does not equal -8....
I mean that's not mathematical induction, but sure
2. (Original post by 13 1 20 8 42)
I thought it was undefined until this year and I'm a maths student lel. As far as I know it is generally accepted to be 1 but I can't recall why even though I have looked into it before.
I think it is??? i dunno have to look at the video again since it's supposed to be one of those "not possible" things just like a fractions with a demoninator of 0 isn't possible.
3. (Original post by thegreatwhale)
I think it is??? i dunno have to look at the video again since it's supposed to be one of those "not possible" things just like a fractions with a demoninator of 0 isn't possible.
I think it mainly boils down to the fact that it is more convenient to have it equal to 1. In one sense, it technically is undefined, but it makes things make more sense in areas like set theory and discrete maths to have it equal 1.
4. (Original post by 13 1 20 8 42)
I think it mainly boils down to the fact that it is more convenient to have it equal to 1. In one sense, it technically is undefined, but it makes things make more sense in areas like set theory and discrete maths to have it equal 1.
yea i guess
5. (Original post by 13 1 20 8 42)
I thought it was undefined until this year and I'm a maths student lel. As far as I know it is generally accepted to be 1 but I can't recall why even though I have looked into it before.
It is frustrating, but you can just use this simple workaround:

I believe this lemma makes what you've done perfectly rigorous.
6. its not
7. (Original post by newblood)
Erm no...
Erm It was a joke rit calm down you little mug hole Or ill throw a Charmander at you
8. (Original post by Protoxylic)
I mean that's not mathematical induction, but sure
It was a joke mate...
9. WAIT WHAT people, how can -4 / -4 be 1?! You're taking something less than zero and making it smaller and ending up with something greater than zero.

This is why I flopped Maths
10. (Original post by abc:))
WAIT WHAT people, how can -4 / -4 be 1?! You're taking something less than zero and making it smaller and ending up with something greater than zero.

This is why I flopped Maths
u wot m8
11. (Original post by NoahMal)
Erm It was a joke rit calm down you little mug hole Or ill throw a Charmander at you
That was too subtle- nobody could see it- on a thread with such a 3rd grade question it's hard to see who's genuinely incompetent and who's kidding
12. I know it is a bit quiet on TSR but this is ridiculous
13. Assume that .

But .

14. (Original post by abc:))
WAIT WHAT people, how can -4 / -4 be 1?! You're taking something less than zero and making it smaller and ending up with something greater than zero.

This is why I flopped Maths
wtf?

how are you making it smaller?
15. (Original post by Student403)
wtf?

how are you making it smaller?
Because if you divide something, the new total is smaller. Half a pizza is smaller than a whole pizza... so I don't understand how -4 divided by anything can equal something greater than 0?

I don't do maths ok!!!!
16. (Original post by abc:))
WAIT WHAT people, how can -4 / -4 be 1?! You're taking something less than zero and making it smaller and ending up with something greater than zero.

This is why I flopped Maths
Well, at least the last sentence makes sense

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17. (Original post by abc:))
Because if you divide something, the new total is smaller. Half a pizza is smaller than a whole pizza... so I don't understand how -4 divided by anything can equal something greater than 0?

I don't do maths ok!!!!
This is the part which is incorrect

That's like saying "if you add something, the new total is bigger". Not necessarily. What happens if you add a negative number?
18. (Original post by drandy76)
Well, at least the last sentence makes sense

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Lol I'm being destroyed I really need this explaining to me
19. (Original post by Student403)
This is the part which is incorrect

That's like saying "if you add something, the new total is bigger". Not necessarily. What happens if you add a negative number?
ohhhhh yeaaah.... penny drop! Thank you lol
20. (Original post by Student403)
This is the part which is incorrect

That's like saying "if you add something, the new total is bigger". Not necessarily. What happens if you add a negative number?
Technically speaking it is getting smaller if we're only concerned with the magnitudes

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