Question

вычислите пример (2+i)^3+(2-i)^3

Answer 1

$(2+i)^3+(2-i)^3 = (8+12i + 6i^2+i^3)+(8-12i+6i^2-i^3) = 8+12i+6i^2+i^3+8-12i+6i^2-i^3 = 16 +12i^2$

Answer 2

8+12i+6i^2+i^3+8-12i-6i^2-i^3=16