Sagot :
Cevap:
4
Adım adım açıklama:
(x+y)nin küpünü alıyoruz yani
x³+3x²y+3xy²+y³
x³+y³=43 verilmiş
altta xy(x+y)parantezini dağıtıyoruz
x²y+xy²=7
x³+3x²y+3xy²+y³
burada x²y+xy²parantezi var
3(x²y+xy²)=21
43+21=64=(x+y)³ x+y#4
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