Question

Упростите выражения.Срочно

Answer 1

$1)a(a - 2b) - (3b + a) {}^{2} \\ a {}^{2} - 2ab - (9b {}^{2} + 6ab + a {}^{2} ) \\ a {}^{2} - 2ab - 9b {}^{2} - 6ab - a {}^{2} \\ - 8ab - 9b {}^{2} \\ 2)(m + 8) {}^{2} - (m - 2n)(m + 2n) \\ m {}^{2} + 16m + 64 - (m {}^{2} + 2mn - 2mn - 4n {}^{2} ) \\ m {}^{2} + 16m + 64 - m {}^{2} + 4n {}^{2} \\ 4n {}^{2} + 16m + 64 \\ 3)3(b - 10) {}^{2} + 8b - 5b {}^{2} \\ 3(b {}^{2} - 20b + 100) + 8b - 5b {}^{2} \\ 3b {}^{2} - 60b + 300 + 8b - 5b {}^{2} \\ - 2b {}^{2} - 52b + 300 \\ 4)( n+ 15) {}^{2} - n(n - 19) \\ n {}^{2} + 30n + 225 - n {}^{2} + 19n \\ 49n + 225 \\ 5) 4c(9c - 3) - (6c + 1) {}^{2} \\ 36c {}^{2} - 12c - (36c {}^{2} - 12c + 1) \\ 36c {}^{2} - 12c - 36c {}^{2} + 12c - 1 \\ - 1 \\ 6)(6 - 5m)(5m + 6) + (5m - 4) {}^{2} \\ 30m + 36 - 25m {}^{2} - 30m + 25m {}^{2} + 40m + 16 \\ 40m + 52$