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x = 2022, y = 2020 olmak üzere (x + y)2 - 4xy ifadesinin eşiti aşağıdakilerden hangisidir? A) 2 B)3 C)4 D)5​

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(x+y)² → x²+2xy+y² demektir.

x²+2xy+y² -4xy → x²-2xy+y² olur.

Bu ifade (x-y)² demektir.

(2022-2020)² = 2² = 4

Cevap: C

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