Question

let a = b .
multiplying a to both sides
a square = ab
subtracting b square from both sides
a square - b square = ab- b square
( a + b) ( a - b ) = b ( a - b)
a + b = b
b + b = b
2b = b
2 = 1
what's the mistake in this solution?​

Answer 1

Hey bro,

If a + b = b

then a = b - b

Therefore a = 0