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|a-2007|+√a-2008=aa>=2007,a-2007+√a-2008=a,√a=4015,a=4015^2=16120225a-2007=16120225-2007=16118218(a-2007)^2=16118218^2=259796951495524a<=2007,2007-a+√a-2008=a,√a=2a+1,a=4a^2+4a+14a^2+3a+1=0,(2a+3/4)^2+1-9/16=0,(2a+3/4)^2=-7/16这是不可能的所以a-2007的平方的值是259796951495524 |
