а) 27x^3 + 0.064y^3 = 3^3(x)^3 + (0.2y)^3
= (3x + 0.2y)(9x^2 - 1.8xy + 0.04y^2)

б) a^3b^6 + c^12 = (ab^2)^3 + (c^6)^2
= (ab^2 + c^6)(a^2b^4 - ab^2c^6 + c^12)