2009+2009²-2010²
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 04:35:56
![2009+2009²-2010²](/uploads/image/z/8664233-41-3.jpg?t=2009%2B2009%26%23178%3B-2010%26%23178%3B)
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2009+2009²-2010²
2009+2009²-2010²
2009+2009²-2010²
2009+2009²-2010²
=2009(2009+1)-2010^2
=2010(2009-2010)
=2010x-1
=-2010
2009+2009²-2010²
=2009+(2009-2010)(2009+2010)
=2009-2009-2010
=-2010