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Salut! Rezolvati escuatia [tex] 4^{x+2} = 2^{x2+5} [/tex]

Răspuns :

4^(x+2) =2^2(x+2)=2^(2x+4)   =2^(x^2) +5 =>
=>2x+4=x^2+5=> 0=x^2+5-2x-4=> 0=x^2-2x+1 => (x-1)^2=0 <=>
<=> x=1
verificand   4^3 =2^6 (A)