(2x+1)²-(x+3)²-(x-1)²+1要有非常详细的解答过程,
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![(2x+1)²-(x+3)²-(x-1)²+1要有非常详细的解答过程,](/uploads/image/z/1002653-53-3.jpg?t=%EF%BC%882x%2B1%EF%BC%89%26%23178%3B%EF%BC%8D%EF%BC%88x%2B3%EF%BC%89%26%23178%3B-%EF%BC%88x-1%EF%BC%89%26%23178%3B%2B1%E8%A6%81%E6%9C%89%E9%9D%9E%E5%B8%B8%E8%AF%A6%E7%BB%86%E7%9A%84%E8%A7%A3%E7%AD%94%E8%BF%87%E7%A8%8B%2C)
(2x+1)²-(x+3)²-(x-1)²+1要有非常详细的解答过程,
(2x+1)²-(x+3)²-(x-1)²+1要有非常详细的解答过程,
(2x+1)²-(x+3)²-(x-1)²+1要有非常详细的解答过程,
=(2x+1)^2-(x+3)^2-[(x-1)^2-1]
=(2x+1+x+3)*(2x+1-x-3)-(x-1+1)*(x-1-1)
=(x-2)*(3x+4-1)
=2*(x+2)*(x-2)
=2x^2-8