x제곱+y제곱은(x+y)제곱-2xy가됩니다따라서2xy=1xy=2분의일이네요x세제곱+y세제곱은(x+y)(x²-xy+y²)이거구요따라서대입하면됩니다2곱하기(3-1)따라서4입니다
[무물보AI] 답변 로딩중...