Question

find argument of (2-1)^2

Answer 1

(a+b)^2 = 4+1-4
= 1

this is the answer of your question

Answer 2

This is a simple question

We know that ,

( a+b )^2 = a^2 + 2ab + b^2

(2-1)^2 = 4 - 4 + 1

= 1