(a-b)= 0 por lo tanto de indefine la funcion al tener denominador cero!

Very wrong..
If u divide the equation by (a-b), it's the same as you divided the equation by zero..
Hence, an equation divided by zero will be UNDEFINED

ghiku you are wright ... but in video ... if you made the execise in letters ... then is correct ... and a+b=b ... BUT ... if you put numbers instead of letters like a=1 and b=1 ... the yea ghiku ... you are wrigth (sry my bad english)

hahahaaa ce natarau!!nici macar nu e adevarat :2=1

Very wrong because you divided the terms by zero because (a-b) = 0 so you can not divided by it ......

there is a faul
watch the video on 1:17 and this is the wrong. cause we can't eliminate a-b cauce it's equal 0 . and sorry for my english

Ohh man das mal sowas von absulut falsch berechnet

true! very wrong!

think u have 3 on maths

this is rong

if like tat,it no amazing already~~~just lie ppl~~

.... ghiku is telling the truth

this trick doesn't prove that 2=1, why ? cause it's wrong a-b=1-1= 0, hence (a+b)(a-b)=b(a-b) <=> 2*0=1*0 <=> 0=0... this is the secret ;) and even if you go for the dividing... by maths law u can't divide by a-b, cause a-b=0...