Sagot :
X+Y işleminde -2kök3 ve +2kök3 birbirni götürür x’te 8 ve y’de 1 kalır onları toplarsan x+y=9 olur. Xüssü2 + 2xy + Y üssü2 ifadesi (x+y)’nin karesidir. 9un karesi de 81 yani cevap A
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