急1.若a的2次方+b的2次方=8,a-b=3,则ab的值为__2.计算(2×10的2次方)3次方×(3×10的3次方)2次方-(4×10的4次方)3次方3.已知x的2次方+x-1=0,求x的3次方+x的2次方+2011的值4.若(a+b)的2次方=5,(a-b)
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![急1.若a的2次方+b的2次方=8,a-b=3,则ab的值为__2.计算(2×10的2次方)3次方×(3×10的3次方)2次方-(4×10的4次方)3次方3.已知x的2次方+x-1=0,求x的3次方+x的2次方+2011的值4.若(a+b)的2次方=5,(a-b)](/uploads/image/z/3872461-13-1.jpg?t=%E6%80%A51.%E8%8B%A5a%E7%9A%842%E6%AC%A1%E6%96%B9%2Bb%E7%9A%842%E6%AC%A1%E6%96%B9%3D8%2Ca%EF%BC%8Db%3D3%2C%E5%88%99ab%E7%9A%84%E5%80%BC%E4%B8%BA__2.%E8%AE%A1%E7%AE%97%EF%BC%882%C3%9710%E7%9A%842%E6%AC%A1%E6%96%B9%EF%BC%893%E6%AC%A1%E6%96%B9%C3%97%EF%BC%883%C3%9710%E7%9A%843%E6%AC%A1%E6%96%B9%EF%BC%892%E6%AC%A1%E6%96%B9%EF%BC%8D%EF%BC%884%C3%9710%E7%9A%844%E6%AC%A1%E6%96%B9%EF%BC%893%E6%AC%A1%E6%96%B93.%E5%B7%B2%E7%9F%A5x%E7%9A%842%E6%AC%A1%E6%96%B9%2Bx%EF%BC%8D1%3D0%2C%E6%B1%82x%E7%9A%843%E6%AC%A1%E6%96%B9%2Bx%E7%9A%842%E6%AC%A1%E6%96%B9%2B2011%E7%9A%84%E5%80%BC4.%E8%8B%A5%EF%BC%88a%2Bb%29%E7%9A%842%E6%AC%A1%E6%96%B9%3D5%2C%28a-b%29)
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