what is 2x to the second power equals 54

PLEASE USE PARENTHESES !!!!

if
2 x^2 = 54
x^2 = 27
x = +/- 3 sqrt 3

but if
(2x)^2 = 54
4 x^2 = 54
x^2 = 13.5
x = +/- sqrt 13.5