Answer:
C) [tex]\{\frac{1+\sqrt{5}}{3},\:\frac{1-\sqrt{5}}{3}\}[/tex]
Step-by-step explanation:
[tex](3x-1)^2=5\\\\3x-1=\pm\sqrt{5}\\\\3x=1\pm\sqrt{5}\\\\x=\frac{1\pm\sqrt{5}}{3}\\ \\\{\frac{1+\sqrt{5}}{3},\:\frac{1-\sqrt{5}}{3}\}[/tex]
