?
Tommy, you put up seven posts with no work shown, no questions of your own asked, and no statements about what you already know or tried.
That's not how it goes here.
Also, you need to learn some rules for typing math. I can't tell what your equation is because you did not use grouping symbols to indicate what's under the square root symbol.
Here's my guess:
\(\displaystyle \sqrt{2x + 6} \ = \ x \ + \ 2\)
If this is correct, then here is how we type it, using a keyboard.
sqrt(2x + 6) = x + 2
Begin by squaring both sides. Doing that leads to a quadratic equation.
Show us what you get, or correct the equation, if I guessed wrongly.