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= 15  ;   a³+b³=885

hallar: "ab"

(a+b)³ = (15)³

a³ + b³ + 3ab (a+b) = (15)³

885 + 3ab (15) = 3375

3ab (15) = 3375 - 885

3ab (15) = 2490

3ab = 2490/15

3ab = 166

ab = 166/3