1.已知2(a+1)(a-1)-(a+b)(a-b)-5b的2次方=3 求(a+2b)(a-2b)的值2.如果x+y=2,x-y=-1005,那么代数式y的2次方减去x的2次方的值是3.如果(2a+2b+1)(2a+2b-1)=63,那么a+b的值是4.计算:(2x-1)(2x-1)(4x的2次方+
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![1.已知2(a+1)(a-1)-(a+b)(a-b)-5b的2次方=3 求(a+2b)(a-2b)的值2.如果x+y=2,x-y=-1005,那么代数式y的2次方减去x的2次方的值是3.如果(2a+2b+1)(2a+2b-1)=63,那么a+b的值是4.计算:(2x-1)(2x-1)(4x的2次方+](/uploads/image/z/11494700-44-0.jpg?t=1.%E5%B7%B2%E7%9F%A52%EF%BC%88a%2B1%29%28a-1%29-%28a%2Bb%29%28a-b%29-5b%E7%9A%842%E6%AC%A1%E6%96%B9%3D3+%E6%B1%82%EF%BC%88a%2B2b%29%28a-2b%29%E7%9A%84%E5%80%BC2.%E5%A6%82%E6%9E%9Cx%2By%3D2%2Cx-y%3D-1005%2C%E9%82%A3%E4%B9%88%E4%BB%A3%E6%95%B0%E5%BC%8Fy%E7%9A%842%E6%AC%A1%E6%96%B9%E5%87%8F%E5%8E%BBx%E7%9A%842%E6%AC%A1%E6%96%B9%E7%9A%84%E5%80%BC%E6%98%AF3.%E5%A6%82%E6%9E%9C%EF%BC%882a%2B2b%2B1%EF%BC%89%EF%BC%882a%2B2b-1%EF%BC%89%3D63%2C%E9%82%A3%E4%B9%88a%2Bb%E7%9A%84%E5%80%BC%E6%98%AF4.%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%882x-1%EF%BC%89%EF%BC%882x-1%EF%BC%89%EF%BC%884x%E7%9A%842%E6%AC%A1%E6%96%B9%2B)
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