Question

Resolva a equação exponencial 25^x-4=1/125

Answer 1

25^(x-4) = 1/125

5^2(x-4) = 5^(-3)

Anulamos as bases iguais:

2x-8 = -3

2x = -3+8

2x = 5

x = 5/2

Answer 2

25^x-4=1/125

(5^2)^x-4 = 5^-3

2x - 8 = - 3

2x = - 3 +8

2x = 5 ==. x = 5/2