Question

номер 310 помогите плизз

Answer 1

$3 \times 6^{2} = 3 \times 36 = 108 \\ (3 \times 6) ^{2} = 18 ^{2} = 324 \\ 324 - 108 = 216 \\ (7 + 12) ^{2} = 19 ^{2} = 361 \\ 7 ^{2} + 12 ^{2} = 49 + 144 = 193 \\ 361 - 193 = 168$