Здесь a = 3c^2 и b = 4.
a = 3c^2
b = 4
(3c^2 - 4)(3c^2 + 4) = (3c^2)^2 - 4^2 = 9c^4 - 16
0.6c * (9c^4 - 16)
0.6c * 9c^4 - 0.6c * 16
5.4c^5 - 9.6c
Ответ: 5.4c^5 - 9.6c