The correct first step is to take the square root of both sides.
That is because when you take the square root of a number raised to the power of 2, the square and the square root cancel out each other.
Hence,
[tex]\begin{gathered} (2x-5)^2=49 \\ \sqrt[]{(2x-5)^2}=\sqrt[]{49} \\ 2x-5=7 \\ 2x=7+5 \\ 2x=12 \\ \text{Divide both sides by 2} \\ x=6 \end{gathered}[/tex]Take the square root of both sides is the correct option
