Question

Is a 2 + b 2 - 2ab = (a-b) ​2 or (b-a) 2 ??

Answer 1

Both result in the same thing. This is because, both negative and positive values will become positive after they are squared. So, both (a-b) and (b-a) squared is right.

Answer 2

it is( a-b) 2.for this