A classmate says the first step to solve the equation 12(3g-9)=99 is to add to both sides do you agree

The vertex of this parabola is at (-2, 5). which of the following could be it’s equation? a. y=3(x+2)^2-5 b. y=3(x-2)^2-5 c. y=3(x+2)^2+5 d. y=3(x-2)^2+5

Im literally having a mental breakdown

What is the solution to the equation below? 3/x-2+6=square root x-2 +8