👤

2 la x -4 egal 4 .............

Răspuns :

"2 la x -4 egal 4"

2^x - 4 = 4

[tex]\it 2^x -4 =4 \Longleftrightarrow 2^x =4+4 \Longleftrightarrow 2^x =8 \Longleftrightarrow 2^x =2^3[/tex]
2lax-4=4
2 la x=8
x=3
Verificare:2³-4=4