a²-b²-2a+1怎么解如题好吧我已经知道答案了- -我就采纳最快回答的那个,
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![a²-b²-2a+1怎么解如题好吧我已经知道答案了- -我就采纳最快回答的那个,](/uploads/image/z/2591974-46-4.jpg?t=a%26%23178%3B-b%26%23178%3B-2a%2B1%E6%80%8E%E4%B9%88%E8%A7%A3%E5%A6%82%E9%A2%98%E5%A5%BD%E5%90%A7%E6%88%91%E5%B7%B2%E7%BB%8F%E7%9F%A5%E9%81%93%E7%AD%94%E6%A1%88%E4%BA%86-+-%E6%88%91%E5%B0%B1%E9%87%87%E7%BA%B3%E6%9C%80%E5%BF%AB%E5%9B%9E%E7%AD%94%E7%9A%84%E9%82%A3%E4%B8%AA%2C)
a²-b²-2a+1怎么解如题好吧我已经知道答案了- -我就采纳最快回答的那个,
a²-b²-2a+1怎么解
如题
好吧我已经知道答案了- -我就采纳最快回答的那个,
a²-b²-2a+1怎么解如题好吧我已经知道答案了- -我就采纳最快回答的那个,
a²-b²-2a+1
=(a²-2a+1)-b²
=(a-1)²-b²
=(a-1+b)(a-1-b)