Question

tìm x: 4^x+4-4^x= 4080

Answer 1

`4^(x+4)-4^x =4080`

`=>4^x *4^4 -4^x =4080`

`=>4^x (256-1)=4080`

`=>4^x *255=4080`

`=>4^x =16`

`=>4^x =4^2`

`=>x=2`