Solve for a, d
a=\frac{-\sqrt{37}-1}{2}\approx -3.541381265\text{, }d=\frac{\sqrt{37}+1}{2}\approx 3.541381265
a=\frac{\sqrt{37}-1}{2}\approx 2.541381265\text{, }d=\frac{1-\sqrt{37}}{2}\approx -2.541381265
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