Solve for x, y
x=\frac{-\sqrt{12\sqrt{7}+141}-1}{2}\approx -7.071700992\text{, }y=\frac{\sqrt{12\sqrt{7}+141}}{2}+3\sqrt{7}+\frac{1}{2}\approx 15.008954926
x=\frac{\sqrt{141-12\sqrt{7}}-1}{2}\approx 4.726159782\text{, }y=-\frac{\sqrt{141-12\sqrt{7}}}{2}+\frac{1}{2}-3\sqrt{7}\approx -12.663413715
x=\frac{-\sqrt{141-12\sqrt{7}}-1}{2}\approx -5.726159782\text{, }y=\frac{\sqrt{141-12\sqrt{7}}}{2}+\frac{1}{2}-3\sqrt{7}\approx -2.211094151
x=\frac{\sqrt{12\sqrt{7}+141}-1}{2}\approx 6.071700992\text{, }y=-\frac{\sqrt{12\sqrt{7}+141}}{2}+3\sqrt{7}+\frac{1}{2}\approx 1.865552941
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