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📰 y = \frac{-42 \pm \sqrt{1764 - 1512}}{54} = \frac{-42 \pm \sqrt{252}}{54} = \frac{-42 \pm 6\sqrt{7}}{54} = \frac{-7 \pm \sqrt{7}}{9}. 📰 We want positive ratio. Try $ y = \frac{-7 + \sqrt{7}}{9} \approx \frac{-7 + 2.6458}{9} = \frac{-4.3542}{9} \approx -0.484 $, negative. Other root: $ \frac{-7 - 2.6458}{9} < 0 $. Both negative — meaning $ A/d < 0 $, so first and last have opposite signs — impossible for $ A^2 + (A+3d)^2 = (sum)^2 $ unless not ordered. 📰 Wait — the original assumption about ordering may be wrong. Try symmetric AP: let the four terms be $ a - 3d, a - d, a + d, a + 3d $ — symmetric around $ a $. This is a valid arithmetic progression with common difference $ 2d $, but we can scale. Define as AP with common difference $ 2d' $, but to match convention, let common difference be $ 2d $, so terms: $ a - 3d, a - d, a + d, a + 3d $. Then first: $ a - 3d $, last: $ a + 3d $, sum of squares: $ (a-3d)^2 + (a+3d)^2 = 2a^2 + 18d^2 $. Sum of all: $ 4a $, square: $ 16a^2 $. Set equal: 📰 Witcher 3 Release Date 3538203 📰 Steatosis 8450528 📰 Corn Syrup Exposed The Secret Danger Keeping Health Experts Up At Night 2597529 📰 Fubo Tv Price 2158375 📰 Deposit Checks Online Wells Fargo 1485051 📰 Youre Going Wild The Most Crazy Spill Games Teaming Up Today 1310673 📰 How To Reset My Laptop To Factory Settings 886944 📰 Top 10 Excellent Keyboards For Gaming You Need In 2024 Dont Miss These Hidden Gems 5102267 📰 Upgrade Your View The Ultimate Brightness Display That Wows Every User 8917694 📰 Defiance Movie Cast 5783325 📰 Installing A Water Softener System 8472322 📰 Loan Shark Game 8425426 📰 Can These Basketball Stars Basketball Dominate The Finals Find Out Now 3255569 📰 Washington Liberty High School 7598501 📰 What Capital City Steals The Spotlight Facts You Never Knew 445286