Question

Resolva em IR 5(2x)^3= 640

Answer 1

5 . (2 x )³ = 640
5 .  8 x³ = 640
40 x³ = 640
x³ = 640/40
x³ = 16
x = ∛16
x = ∛ 2³ . 2
x = 2.∛2