Question

Resolva a equação exponencial: 9 elevado 2x_1= 81

Answer 1

9^2x-1=81
9^2x-1=9²
2x-1=2
2x=2+1
2x=3
x=3/2

Resposta x= 3/2 

Answer 2

9* 2x-1 = 81
9* 2x-1 = 9* 2
2x-1 = 2
2x = 3
X = 3/2 = 1,5