Question

solve the equation algebraically
3(3x-1)^2=21

Answer 1

\[3(3x-1)^{2}=21\]

Answer 2

\[(3x-1)^{2}=7\]

Answer 3

\[3x-1=\sqrt{7}\]

Answer 4

\[3x=1+\sqrt{7}\]

Answer 5

\[x=\frac{ 1+\sqrt{7} }{ 3 }\]

Answer 6

don't forget the \(\pm\)

Answer 7

\[x=\frac{ 1\pm\sqrt{7} }{ 3 }\]