Question

(m-2)²+(m-4)²-2m²+12

Answer 1

${(m - 2)}^{2} = \\ \\ {m}^{2} - 2m - 2m + 4 = \\ \\ {m}^{2} - 4m + 4$

${(m + 4)}^{2} = \\ \\ {m}^{2} + 4m + 4m + 16 = \\ \\ {m}^{2} + 8m + 16$

${m}^{2} - 4m + 4 + {m}^{2} + 8m + 16 - {2m}^{2} + 12 = \\ \\ = {2m}^{2} - {2m}^{2} + 4m + 20 + 12 = \\ \\ = 4m + 32$

espero haberte ayudado