Answer:
[tex]x_{12} = 4 \pm \sqrt{6}[/tex]
Step-by-step explanation:
3(x-4)^2 = 18
We divide everything by 3;
(x-4)^2 = 6
Take the square root on both sides:
[tex]x-4 = \pm \sqrt{6}\\x_{12} = 4 \pm \sqrt{6}[/tex]
