1=2, 1=-1, 2=-1....

[Silenoz]

1=2
--------------------------------------------------------------------------
a=b

a²=ab (multiply by a)
a² + a² - 2ab = ab + a² - 2ab (add a² - 2ab)
2(a² - ab) = a² - ab (factor the left)
2 = 1

[Mortaj Delvas]

problem #1


1=2
--------------------------------------------------------------------------
a=b

a²=ab (multiply by a)
a² + a² - 2ab = ab + a² - 2ab (add a² - 2ab)
2(a² - ab) = a² - ab (factor the left)
2 = 1


since a²=ab
then a² - ab =0
you can't factor this since you can't divde by 0

Sorry I couldn't follow the second problem

[Silenoz]

*Red handed* You got me. A lot of people fall for that one ;). I'm just gonna delete the second proof because I can't make the fractions look legible on this format.

[Mortaj Delvas]

I'm a high school physics/math teacher. Sorry I had to call you on that one.