Question

rezolvarea completa ? va rog!

Answer 1

DVA:x>0
$log_{2}(x+2)= log_{2} 8- log_{2} x \\ x+2= \frac{8}{x} \\ x^{2} +2x -8=0 \\ x_{1}=-4 \\ x_{2}=2$
-4∉DVA
S={2}