Respuesta:
9
Explicación paso a paso:
(a + b + c)^2 = a ^2 + b^2 +c^2 +2(ab+bc+ac)
5^2 = 7 + 2(ab + bc+ac)
18 = 2(ab+bc+ac)
9 =ab+bc+ac
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Respuesta:
9
Explicación paso a paso:
(a + b + c)^2 = a ^2 + b^2 +c^2 +2(ab+bc+ac)
5^2 = 7 + 2(ab + bc+ac)
18 = 2(ab+bc+ac)
9 =ab+bc+ac