Some quadratic equations need to be stated differently before they can
be flipped. One wants to isolate the term on x that is being squared. The
constant at the end just moves the parabola up and down.
Flipping is expressing that, if y is the x-term squared; x is the square root of y.
For the blue, our square-root term is positive on top, negative on the bottom.
Same for the gray, only we are working from negative x-values.
Below, the actual roots of the initial equation.
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