问几道超简单,而我有不会的数学题,高手解!1. a-b=5√2,ab=√2+1.求(a-1)×(b+1)的值?2. √8-1/8√48-(2/3√9/2-√3/4)3. 一个长方形的对角线为√150,一边长为√96,求周长?4. 已知x=√2+1,y=√2-1,求x^2+2xy+y^2
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![问几道超简单,而我有不会的数学题,高手解!1. a-b=5√2,ab=√2+1.求(a-1)×(b+1)的值?2. √8-1/8√48-(2/3√9/2-√3/4)3. 一个长方形的对角线为√150,一边长为√96,求周长?4. 已知x=√2+1,y=√2-1,求x^2+2xy+y^2](/uploads/image/z/7826530-58-0.jpg?t=%E9%97%AE%E5%87%A0%E9%81%93%E8%B6%85%E7%AE%80%E5%8D%95%2C%E8%80%8C%E6%88%91%E6%9C%89%E4%B8%8D%E4%BC%9A%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E9%AB%98%E6%89%8B%E8%A7%A3%211.++a-b%3D5%E2%88%9A2%2Cab%3D%E2%88%9A2%2B1.%E6%B1%82%28a-1%29%C3%97%28b%2B1%29%E7%9A%84%E5%80%BC%3F2.++%E2%88%9A8-1%2F8%E2%88%9A48-%282%2F3%E2%88%9A9%2F2-%E2%88%9A3%2F4%293.++%E4%B8%80%E4%B8%AA%E9%95%BF%E6%96%B9%E5%BD%A2%E7%9A%84%E5%AF%B9%E8%A7%92%E7%BA%BF%E4%B8%BA%E2%88%9A150%2C%E4%B8%80%E8%BE%B9%E9%95%BF%E4%B8%BA%E2%88%9A96%2C%E6%B1%82%E5%91%A8%E9%95%BF%3F4.++%E5%B7%B2%E7%9F%A5x%3D%E2%88%9A2%2B1%2Cy%3D%E2%88%9A2-1%2C%E6%B1%82x%5E2%2B2xy%2By%5E2)
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