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(a + b)² = 18 (a - b)² = 6 olduğuna göre, a . b çarpımı kaçtır?
A) 2 B) 3 C) 4 D) 5 E) 9​

Sagot :

Yunuspino1905rans

Cevap:

B

Adım adım açıklama:

a²+2ab+b² = 18

a²-2ab+b² = 6

İki denklemi birbirinden çıkarırsak,

4ab = 12

ab = 3 olur.

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