Solve for p
p=\frac{\sqrt{4q^{2}-3r^{2}}}{2}
p=-\frac{\sqrt{4q^{2}-3r^{2}}}{2}\text{, }|q|\geq \frac{\sqrt{3}|r|}{2}
Solve for q
q=\frac{\sqrt{4p^{2}+3r^{2}}}{2}
q=-\frac{\sqrt{4p^{2}+3r^{2}}}{2}
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