а) 27b^3 - 1 = (3b - 1)(9b^2 + 3b + 1)б) 8 + a^3 = (2 + a)(4 - 2a + a^2)в) 16 - 2c^3 = (2 - c)(4 + 2c + c^2)г) 4 - 0.5b^3 = (2 - 0.5b)(2 + 0.5b + 0.25b^2) = (2 - 0.5b)(2 + 0.5b)(1 + 0.5b)
а) 27b^3 - 1 = (3b - 1)(9b^2 + 3b + 1)
б) 8 + a^3 = (2 + a)(4 - 2a + a^2)
в) 16 - 2c^3 = (2 - c)(4 + 2c + c^2)
г) 4 - 0.5b^3 = (2 - 0.5b)(2 + 0.5b + 0.25b^2) = (2 - 0.5b)(2 + 0.5b)(1 + 0.5b)