Question

помогите пожалуйста решить​

Answer 1

$1) \: {a}^{2} + 2a + 1 = {(a + 1)}^{2} \\ 2) \: {b}^{2} - 8b + 16 = {(b - 4)}^{2} \\ 3) \: {c}^{2} + 10c + 25 = {(c + 5)}^{2} \\ 4) \: {n}^{2} + 14n + 49 = {(n + 7)}^{2} \\ 5) \: 100 - 20z + {z}^{2} = {(10 - z)}^{2} \\ 6) \: 81 + 18b + {b}^{2} = {(9 + b)}^{2}$