求助初三二次根式数学题.x=2+=√3(根号3),y=2-=√3,则7x² +11xy+4y² =?若代数式y=√1-2x+√(x-1)²+√2x-1 则代数式(x+y)的2007次方为多少?化简√4x² -4x+1-(√2x-3)²的值为.最好有
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![求助初三二次根式数学题.x=2+=√3(根号3),y=2-=√3,则7x² +11xy+4y² =?若代数式y=√1-2x+√(x-1)²+√2x-1 则代数式(x+y)的2007次方为多少?化简√4x² -4x+1-(√2x-3)²的值为.最好有](/uploads/image/z/956873-65-3.jpg?t=%E6%B1%82%E5%8A%A9%E5%88%9D%E4%B8%89%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E6%95%B0%E5%AD%A6%E9%A2%98.x%3D2%2B%3D%E2%88%9A3%28%E6%A0%B9%E5%8F%B73%EF%BC%89%2Cy%3D2-%3D%E2%88%9A3%2C%E5%88%997x%26sup2%3B+%2B11xy%2B4y%26sup2%3B+%3D%3F%E8%8B%A5%E4%BB%A3%E6%95%B0%E5%BC%8Fy%3D%E2%88%9A1-2x%2B%E2%88%9A%EF%BC%88x-1%EF%BC%89%26sup2%3B%2B%E2%88%9A2x-1+%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%88x%2By%EF%BC%89%E7%9A%842007%E6%AC%A1%E6%96%B9%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%E5%8C%96%E7%AE%80%E2%88%9A4x%26sup2%3B+-4x%2B1-%EF%BC%88%E2%88%9A2x-3%EF%BC%89%26sup2%3B%E7%9A%84%E5%80%BC%E4%B8%BA.%E6%9C%80%E5%A5%BD%E6%9C%89)
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