a) b(a+c) = ba + bc = 2a + 2cб) a^3 - b^2 - 3a + 3b = (a - b)(a^2 + ab + b^2) - 3(a - b) = (a - b)(a^2 + ab + b^2 - 3)в) (b + 8)^2 - 4i^2 = (b + 8)^2 - 4 = b^2 + 16b + 64 - 4 = b^2 + 16b + 60
a) b(a+c) = ba + bc = 2a + 2c
б) a^3 - b^2 - 3a + 3b = (a - b)(a^2 + ab + b^2) - 3(a - b) = (a - b)(a^2 + ab + b^2 - 3)
в) (b + 8)^2 - 4i^2 = (b + 8)^2 - 4 = b^2 + 16b + 64 - 4 = b^2 + 16b + 60