Question

X= (the square root of X + 13) + 7

Answer 1

x=sqrt(x+13) +7

hence correct ?

Answer 2

so then

x-7=sqrt(x+13) square both sides

(x-7)^2 = x-13

x^2 -14x +49 = x-13

x^2 - 15x +62 = 0 so this is a quadratic what you need to solve

Answer 3

why does x+13 change to x-13?