Question

разложите на множители 1)27-a^3=     2)64m^3-1=     3)0.0008+a^3=     4)1+0.027n^3

Answer 1

$1) 27 - a^3 = (3 - a)(9 + 3a + a^2)\\ 2) 64m^3-1 = (4m - 1)(16m^2 + 4m + 1)\\ 3) 0.008+a^3 = (0.2 + a)(0.04-0.2a+a^2)\\ 4) 1+0.027n^3 = (1 + 0.3n)(1 - 0.3n + 0.09n^2)$