Question

x2-2x+1 

Answer 1

\(=x^2-2\cdot x\cdot1+1^2=\left(x-1\right)^2\)

Answer 2

`x^2-2x+1 =(x-1)^2`

`@ ` HĐT : `(x-y)^2=x^2-2.x.1+y^2`

                  `(x-1)^2=x^2-2.x.1+1^2=x^2-2x+1`

\(#MINXINHGAI\)

Answer 3

\(x^2-2x+1\)

\(=x^2-2.x.1+1^2\)

\(=\left(x-1\right)^2\)