log2 (x-2) log2 (x+2)=5​

Răspuns :

Răspuns:

log2 (x-2)×log2(x+2)=5

log2 (x-2)(x+2)=5

(x-2)(x+2)= log 2⁵

x²-4= 5log2(2)

x²-4= 5

x² =5+4

x² =9

x = +/-3