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不好意思,你之前提問的那題,有一處算錯了. 現在給你重新回答 (2x+5)²;-(2x+1)²;=25(1-x) (4x²;+20x+25)-(4x²;+4x+1)=25-25x 16x+24=25-25x 16x+25x=25-24 41x=1 x=1/41 答案:x=1/41
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