Resposta :
[tex]\Huge\boxed {\large\begin{array}{l}\sf x^{2} -4x+4 \\ \\ \sf 2^{2} -4.2+4\\ \\ \sf 4 -4.2+4\\ \\ \sf 4 - 8 + 4 \\ \\ \sf -4+4\\ \\ \sf 0\end {array}}[/tex]
[tex]\Huge\boxed {\large\begin{array}{l}\sf x^{2} -4x+4 \\ \\ \sf 2^{2} -4.2+4\\ \\ \sf 4 -4.2+4\\ \\ \sf 4 - 8 + 4 \\ \\ \sf -4+4\\ \\ \sf 0\end {array}}[/tex]