solutiile reale ale ecuatiei

Răspuns:
2ˣ⁻¹+2ˣ=12
2ˣ(2⁻¹ + 1)=12
2ˣ(1/2 +1)=12
2ˣ x 3/2 =12
2ˣ = 12 : 3/2= 12 x 2/3 =8
2ˣ=8=2³⇒ x=3