geometry problem

[carol]

geometry proof
one does not equal two, determine what and where the flaw is. Explain discovery. Problem is as follows:
Let a=b(a and b are not equal to zero)
Proof:

statements reasons

a=a reflexive property
a*a=a*a substitution property
a2 -b2 = a*b-b2 subtraction property
(a -b) (a+b) = b (a-b) factoring (distribution property)
(a+b) = b division property <<< Think about this operation
b+b=b substitution property
2b=b combining like terms
2=1 division property


Please help

 

[carol]

looking at all the properties, are you saying this one does not equal two and this is the flaw. why do you think this?

 

[Denis]

looking at all the properties, are you saying this one does not equal two and this is the flaw. why do you think this?

This is weird...who are you questionning?

Anyhow, a-b = 0: division by 0 is illegal.