..=.= help me

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/13 22:08:02

..=.= help me
1.已知:|2006-a|+(a-2007)的平方根=a,求a-2006^2的值.
不知能否说原因?
Thank you..

|2006-a|+(a-2007)的平方根=a
平方根里面的数大于等于0
a-2007>=0 ,a>=2007
所以原方程变为
a-2006+√(a-2007)=a
√(a-2007)=2006
a=2006^2+2007
a-2006^2
=2006^2+2007-2006^2
=2007

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