Question

Помогите пожалуйста

Answer 1

23. x^2 + 8x = x (x + 8)

24. x^2 - 2x + 3 = x (x - 2) +3

25. x^2 - 10x + 27 = x (x - 10) + 27

26. x^2 + 6x - 3 = x (x + 6) - 3

28. 103^2 = (100+1)^2 = 100^2 + 2 * 100 * 3 + 3^2 = 10609

30. 78^2 = (80-2)^2 = 80^2 - 2 * 80 * 2 + 2^2 = 6084

32. 10,5^2 = (11-0,5)^2 = 11^2 - 2 * 11 * 0,5 + 0,5^2 = 110,25

34. 6,9^2 = (7-0,1)^2 = 7^2 - 2 * 7 * 0,1 + 0,1^2 = 47,61