Calculation of power (- 2) Λ 2005 + 2 Λ 2004 (- what is the power of 2005 of 2 plus the power of 2004 of 2)

-2 ^ 2004 negative 2 to the power of 2004 extract the common factor negative even power equal to the corresponding integer even power (- 2) ^ 2005 + 2 ^ 2004 = (- 2) * (- 2) ^ 2004 + 2 ^ 2004 = (- 2) * 2 ^ 2004 + 2 ^ 2004 = (- 2 + 1) * 2 ^ 2004 = - 2 ^ 2004 the reason for the second equal sign of the above negative number this

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