I found this equation in one of my bedtime books. So interesting that I'd like to share with you all here!

a=b, a=1, show 1=2

a = b

ab = b² (multiply both sides with b)

ab - a² = b² - a² (minus a² for both sides)

a(b-a) = (b+a)(b-a) (factorize)

a = b+a (cancel off the b-a)

a = 2a (since b=a)

1 = 2 (since given a=1, but wait... what the??)

Alright, there's a mistake at the equation above, can you spot it? *laugh* Oh yeah, check the comments for answer (after trying to solve larh!)

__Given:__a=b, a=1, show 1=2

__Proving:__a = b

ab = b² (multiply both sides with b)

ab - a² = b² - a² (minus a² for both sides)

a(b-a) = (b+a)(b-a) (factorize)

a = b+a (cancel off the b-a)

a = 2a (since b=a)

1 = 2 (since given a=1, but wait... what the??)

---

Alright, there's a mistake at the equation above, can you spot it? *laugh* Oh yeah, check the comments for answer (after trying to solve larh!)

## 5 comments:

wat i found out was d " multiply both sides with a"...should be " multiply both sides with b" la...lol... this consider mistake tak??

ahhh, my bad, should be both side with b :p

*fix fix*

Aha, nice try.

I was following it but seriously, it'd got me like this @_@ lol

Jordan,

Das Connection

this is wat i get after seeking someone...

since a=b,

then b-a will = 0

if like that,

u cannot cancel off d (b-a) in ur step 5...

cause, nothing can be divided by 0..

is that d mistake???!!!

*clap clap*

bravo! you got it! hahahha... yeap zero division is the error :)

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