Question

2^×+2+2^×-1=9 gostaria da resposta

Answer 1

Resposta:

2^(x+2)+2^(x-1)=9

2ˣ⁺² + 2ˣ⁻¹ =9

2ˣ *2² +2ˣ *2⁻¹ = 9

4*2ˣ +(1/2)* 2ˣ =9

2ˣ *(4+1/2)=9

2ˣ*(9/2)=9

2ˣ= 9*2/9

2ˣ=2

2ˣ=2¹

x=1