а) 71^2 = (70 + 1)^2 = 70^2 + 2 70 1 + 1^2 = 4900 + 140 + 1 = 5041
б) (-23 целых 3 дробь 23)^2 = (-24 + 1)^2 = 24^2 - 2 24 1 + 1^2 = 576 - 48 + 1 = 529
а) 71^2 = (70 + 1)^2 = 70^2 + 2 70 1 + 1^2 = 4900 + 140 + 1 = 5041
б) (-23 целых 3 дробь 23)^2 = (-24 + 1)^2 = 24^2 - 2 24 1 + 1^2 = 576 - 48 + 1 = 529