Question

a + b = 15, a3 + b3 = 885

Halle: ab.

Answer 1

Respuesta:

ab = 55.33

Explicación paso a paso:

a + b = 15,  a³ + b³ = 885

(a + b)³ = 15³

a³ + b³ + 3ab(a + b) = 3375

885 + 3ab(15) = 3375

3ab(15) = 3375 - 885

45ab = 2490

ab = 2490 / 45

ab = 166 / 3

ab = 55.3333

ab = 55.33