let a = b

a² = b²

a² - b² = 0

(a-b)(a+b)  = 0

as a= b

hence we get

0 (a+b) = 0

putting a = b

and adding + 2 on bothe the sides we 2 = 4 hence prooved

mathematical illusion which brteaks all the exitsing laws of the maths

note::proof is completely wrong