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x2 +y2 =20 , x+y=6 olduguna giore x.y=?​

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Yenikimserans

Merhaba arkadaşım.

Öncelikle verilen denklemi açalım.

x² + y² = 20

=> (x + y)² - 2xy = 20

Şimdi diğer işlemleri yapalım.

6² - 2xy = 20

=> 36 - 2xy = 20

=> 36 - 20 = 2xy

=> 16 = 2xy

=> xy = 8

Cevap: 8

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