Question

m + n = 2 m3 + n3 = 4
Calcular: (mn)​

Answer 1

(m+n)^3 = m^3 + n^3 + 3(mn)(m+n)

(2)^3 = 4 + 3(mn)(2)

8 = 4 + 6(mn)

8 - 4 = 6mn

4 = 6(mn)

mn = 4/6

mn = 2/3

Rpta: 2/3

Espero que te sirva