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July 30th

 
 
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July 30th
Wu Christopher發表於2020年 08月 5日(Wed) 15:05
 

The question asks for the sum of all solution, so I used Vieta’s and got 2. The solution says the answer is 1 because 1 is the only real solution, but the question asks for the sum of all solutions, so the answer should be 2