面积为S且两条邻边的比为2:3的矩形的边长...【这是二次根式的】 我在百度上看见了↓↓↓有几步不懂我不懂 【 两条邻边的比为2:3则不妨设为2a和3a则面积S=2a×3a=6a²a²=S/6显然a>0所以
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![面积为S且两条邻边的比为2:3的矩形的边长...【这是二次根式的】 我在百度上看见了↓↓↓有几步不懂我不懂 【 两条邻边的比为2:3则不妨设为2a和3a则面积S=2a×3a=6a²a²=S/6显然a>0所以](/uploads/image/z/12637282-58-2.jpg?t=%E9%9D%A2%E7%A7%AF%E4%B8%BAS%E4%B8%94%E4%B8%A4%E6%9D%A1%E9%82%BB%E8%BE%B9%E7%9A%84%E6%AF%94%E4%B8%BA2%EF%BC%9A3%E7%9A%84%E7%9F%A9%E5%BD%A2%E7%9A%84%E8%BE%B9%E9%95%BF...%E3%80%90%E8%BF%99%E6%98%AF%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E7%9A%84%E3%80%91+%E6%88%91%E5%9C%A8%E7%99%BE%E5%BA%A6%E4%B8%8A%E7%9C%8B%E8%A7%81%E4%BA%86%E2%86%93%E2%86%93%E2%86%93%E6%9C%89%E5%87%A0%E6%AD%A5%E4%B8%8D%E6%87%82%E6%88%91%E4%B8%8D%E6%87%82+%E3%80%90+%E4%B8%A4%E6%9D%A1%E9%82%BB%E8%BE%B9%E7%9A%84%E6%AF%94%E4%B8%BA2%EF%BC%9A3%E5%88%99%E4%B8%8D%E5%A6%A8%E8%AE%BE%E4%B8%BA2a%E5%92%8C3a%E5%88%99%E9%9D%A2%E7%A7%AFS%3D2a%C3%973a%3D6a%26%23178%3Ba%26%23178%3B%3DS%2F6%E6%98%BE%E7%84%B6a%3E0%E6%89%80%E4%BB%A5)
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