Question

Si se cumple que:

a + b = 15, a3 + b3 = 885

Halle: ab

Answer 1

Respuesta:

Es 166/3

Explicación paso a paso:

(a+b)^3=15^3

a^3+3a^2×b+3ab^2+b^3=3375

a^3+b^3+3ab(a+b)=3375

885+3ab(15)=3375

885+45ab=3375

45ab=3375-885

45ab=2490

ab=2490/45 (simplificando)

ab=166/3