Question

a = b
a2 = ab
a2 - b2 = ab-b2
(a-b)(a+b) = b(a-b)
a+b = b
b+b = b
2b = b
2 = 1
what is wrong here

Answer 1

a+b = b
b+b = b
2b = b
2 = 1

Answer 2

the question is what is wrong in that proof ?

Answer 3

a+b = b

Answer 4

why ???

Answer 5

if a = b, then both a + b = b?

Answer 6

division by zero

Answer 7

yes estudier got it !

Answer 8

U have cancel (a-b) on both sides.
Equivalent to division by zero since a=b

Answer 9

Palmo4ka ur answers are smart