What’s the correct equation for the circle

ii6tyhj7 juj3yyj333ju jmyhthhtk7h jg hajj jiijh

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!