SAT Question 5639dd1a: Nonlinear Equations In One Variable And Systems Of Equations In Two Variables answer and explanation with Desmos solution

The given equation, $x^2=\left(22\right)\left(22\right)$, is equivalent to $x^2={\left(22\right)}^2$. Taking the square root of each side of this equation yields $x=\pm 22$. Thus, the positive solution to the given equation is $22$.