If the square of a + a +1=0, then the 2009 power of a + the 2008 power of a + the 2007 power of a = More clearly, If the square of a + a +1=0, then the 2009 power of a + the 2008 power of a + the 2007 power of a = It is more clear,

2009 Power of a +2008 power of a +2007 power of a
=2007 Power of a*(square of a+a+1)
=2007 Power of a *0
=0

Square of 2008-×2007×2009+2 2009 power ×(-0.5)2007 power Square of 2008-×2007×2009+2 Power of 2009×(-0.5) Power of 2007

Solution;2008 2-2007×2009+2^2009×(-0.5)^2007
=2008²-(2008-1)(2008+1)+2^2009×(-2)^(-2007)
=2008²-2008²+1-2²
=-3

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