а) 21 + 10n + n² = (7 + n)(3 + nб) 14 - 9k + k² = (7 - k)(2 - kв) 42 - 13b + b² = (6 - b)(7 - bг) 48 - 14c + c² = (6 - c)(8 - c)
а) 21 + 10n + n² = (7 + n)(3 + n
б) 14 - 9k + k² = (7 - k)(2 - k
в) 42 - 13b + b² = (6 - b)(7 - b
г) 48 - 14c + c² = (6 - c)(8 - c)