Question

Si: x + y = 3
xy = 1

Hallar x³ + y³

Answer 1

Respuesta:

x³ + y³ = x³ + y³ + 3xy(x+y)

x³ + y³ = x³ + y³ + 3(1)(3)

x³ + y³ = x³ + y³ + 9

x³ + y³ =     3³  +  9

x³ + y³ =     9  +  9

x³ + y³ =  18

RESPUESTA TOTAL = 18

Answer 2

Respuesta:

6 + 6 + 6 = 18

x³ + y³ = 18