[ilker çavuş]

x+y =17
x² − y² =17

x³ + y³ =?

[Alp]

x² − y²=(x-y)(x+y)=17
(x-y)(x+y)=(x-y)17=17
(x-y)=1 dir
(x+y)=17 idi buradan x=9, y=8 çıkar
x³+y³=9³+8³=729+512=1241