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How is -4 divided by -4 = -8

I don't understand how -8 is the answer........

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Original post by Jack_Tomlin
I don't understand how -8 is the answer........


Its not.
It's not...?
Check your calculator again
Reply 4
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Ordo
14
Original post by Jack_Tomlin
I don't understand how -8 is the answer........


1 xDD
Its not, is it?

-4 - 4 = -8

-4 / -4 = 1

No?
Reply 6
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NoahMal
17
-4/-4 Firstly two negatives cancel out hence its 4/4 which is 1 therefore by mathematical induction it does not equal -8....
You probably need to add brackets on your calculator
Reply 8
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2662857
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4
Original post by meemily
Its not, is it?

-4 - 4 = -8

-4 / -4 = 1

No?


That's what I got on my calculator lol
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....


Erm no...
Original post by Jack_Tomlin
That's what I got on my calculator lol


Sounds broken :lol:

You should probably check that its on the right settings (if you used brackets)
Reply 11
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2662857
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4
I just used my scientific calculator instead of my phone and got 1
Reply 12
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2662857
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4
Ok so how would I get -8x on its own? This is from a linear equation
Reply 13
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math42
20
0^0 = 1^0 = 1. Therefore 0 = 1.
Hence -4/-4 = -4(1)/-4 = -4(0)/-4 = 0/-4 = 0 = 8*0 = 8*(-0) = 8*(-1) = -8
Original post by 1 8 13 20 42
0^0 = 1^0 = 1. Therefore 0 = 1.
Hence -4/-4 = -4(1)/-4 = -4(0)/-4 = 0/-4 = 0 = 8*0 = 8*(-0) = 8*(-1) = -8


QED
Original post by Jack_Tomlin
I just used my scientific calculator instead of my phone and got 1


Your phone is an idiot.
Reply 16
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2662857
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4
So can I use these rules when dividing as well as multiplying?

- - = +
++ = +
- + = -
+ - = -
Original post by 1 8 13 20 42
0^0 = 1^0 = 1. Therefore 0 = 1.
Hence -4/-4 = -4(1)/-4 = -4(0)/-4 = 0/-4 = 0 = 8*0 = 8*(-0) = 8*(-1) = -8


is it? numberphile did a vid on that and said that it could be 0 or 1 or used to argue the situation or number which you need(which is generally 1)

interesting though 000^0
you don't need a calculator to work something out that you learnt in year 6/7...
Reply 19
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math42
20
Original post by thegreatwhale
is it? numberphile did a vid on that and said that it could be 0 or 1 or used to argue the situation or number which you need(which is generally 1)

interesting though 000^0


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.

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