a)uma única raiz e negativa.
b)duas raízes irracionais.
c)uma raiz par e outra ímpar.
d)duas raízes opostas.
e)duas raízes pares.
log(5) (x + 2) + log(5) (x – 2) = 3
log(5) (x + 2) + log(5) (x – 2) = log(5) 125
(x + 2) + (x – 2) = 125
2x = 125
x = 125/2
x = 62,5
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Verified answer
log(5) (x + 2) + log(5) (x – 2) = 3
log(5) (x + 2) + log(5) (x – 2) = log(5) 125
(x + 2) + (x – 2) = 125
2x = 125
x = 125/2
x = 62,5