Question

Can someone please help me? :)

Answer 1

@mlearning24

Answer 2

@dan815

Answer 3

\[x^2-4x-6=0\\\]
\[

Answer 4

I can complete the square, but after that i dont know what to do

Answer 5

\[x^2-4x \color{red}{+4-4} -6 =0\\
\color{red}{x^2-4x +4} -10 =0\\
(x-2)^2-10=0\\
(x-2)^2=10\\
\]