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a-b=4 a²-b² = 48 olduğuna göre, 2a + 3b ifadesinin değeri kaçtır? A) 28 B) 24 C) 20 D) 16 E) 12​

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Yultrans

Cevap: A) 28

Adım adım açıklama:
[tex]a^{2}-b^2 = (a-b)(a+b) = 48\\4(a+b) = 48\\(4a + 4b)/4 = (48)/4\\a + b = 12\\a-b = 4\\2a = 16\\a=8, b= 4\\2a + 3b = 16 + 12 = 28[/tex]

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