Help with this equation?

4*√( x-6)=12
[4√(x-6)]/4 = 12/4 = 3
[√(x-6)]^2 = 3^2
x-6 = 9
(x-6)+6 = 9+6
x = 15

4√(x - 6) = 12
√(x - 6) = 12/4
√(x - 6) = 3
x - 6 = 3^2
x = 9 + 6
x = 15

4*sqrt( x-6)=12
(*4√(x-6))^4=12^4
x-6=20736
x=20736+6
x=20742 answer//

yes

4*sqrt(x - 6) = 12..Divide by 4

sqrt(x - 6) = 3...square both sides

x - 6 = 9 ...add 6 to both sides

x = 15

sqrt(x-6) = 12/4 = 3
(x-6) = 9
x=9+6=15