Solve for x
x=y^{2}-91.8
y\geq 0
Solve for x (complex solution)
x=y^{2}-91.8
arg(y)<\pi \text{ or }y=0
Solve for y
y=\sqrt{x+91.8}
x\geq -91.8
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\sqrt{x+91.8}=y
Swap sides so that all variable terms are on the left hand side.
x+91.8=y^{2}
Square both sides of the equation.
x+91.8-91.8=y^{2}-91.8
Subtract 91.8 from both sides of the equation.
x=y^{2}-91.8
Subtracting 91.8 from itself leaves 0.
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