Question

yrurisu
$(m - {7)}^{2}$

Answer 1

$( {m} - 7)^{2} \\ = {m}^{2} + 49 - 14m$

Answer 2

$(m - 7) ^{2} = {m}^{2} + {7}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: - 2(7)(m) \\ \: \: \: \: \: \: \: \: \: \: \: = {m}^{2} + 49 - 14m \\ = (m - 7)(m - 7)$
I hope it is the answer