计算题 (-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方= 计算题(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=x²-(x+2)(x-2)-(x+1/x)²=[(x+y)²-(x-y)²]÷(2xy)=
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![计算题 (-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方= 计算题(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=x²-(x+2)(x-2)-(x+1/x)²=[(x+y)²-(x-y)²]÷(2xy)=](/uploads/image/z/135042-42-2.jpg?t=%E8%AE%A1%E7%AE%97%E9%A2%98+%EF%BC%88-1%EF%BC%89%26%23178%3B%2B%EF%BC%88-1%2F2%EF%BC%89%E7%9A%84-1%E6%AC%A1%E6%96%B9-5%C3%B7%EF%BC%883.14-%CF%80%EF%BC%89%E7%9A%840%E6%AC%A1%E6%96%B9%3D+%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%88-1%EF%BC%89%26%23178%3B%2B%EF%BC%88-1%2F2%EF%BC%89%E7%9A%84-1%E6%AC%A1%E6%96%B9-5%C3%B7%EF%BC%883.14-%CF%80%EF%BC%89%E7%9A%840%E6%AC%A1%E6%96%B9%3Dx%26%23178%3B-%EF%BC%88x%2B2%29%28x-2%29-%28x%2B1%2Fx%29%26%23178%3B%3D%5B%28x%2By%29%26%23178%3B-%28x-y%29%26%23178%3B%5D%C3%B7%EF%BC%882xy%29%3D)
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计算题 (-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方= 计算题(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=x²-(x+2)(x-2)-(x+1/x)²=[(x+y)²-(x-y)²]÷(2xy)=
计算题 (-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=
计算题
(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=
x²-(x+2)(x-2)-(x+1/x)²=
[(x+y)²-(x-y)²]÷(2xy)=
计算题 (-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方= 计算题(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方=x²-(x+2)(x-2)-(x+1/x)²=[(x+y)²-(x-y)²]÷(2xy)=
(-1)²+(-1/2)的-1次方-5÷(3.14-π)的0次方
=1-2-5÷1
=1-2-5
=-6
x²-(x+2)(x-2)-(x+1/x)²
=x²-(x²-4)-(x²+2+1/x²)
x²-x²+4-x²-2-1/x²
=-(x²-2+1/x²)
=-(x+1/x)²
[(x+y)²-(x-y)²]÷(2xy)
=(x²+2xy+y²-x²+2xy-y²)÷(2xy)
=4xy÷(2xy)
=2