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あってますよ!
-(5/2)±2√3
→-(5/2)と±2√3
→-(5/2)と-1×(±2√3)(±は-がついても±のままなので、±2√3のまんま)
→-(5/2)と±4√3/2(整数とかけるのは整数)
→-{(5±4√3}/2)
なるほど。
丁寧にありがとうございます😭
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ありがとうございます!