(7-5根号2)^2000 * (-7-5根号2)^2001

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(7-5根号2)^2000 * (-7-5根号2)^2001
(7-5根号2)^2000 * (-7-5根号2)^2001

(7-5根号2)^2000 * (-7-5根号2)^2001
(7-5根号2)^2000 * (-7-5根号2)^2001
=[(7-5根号2)* (-7-5根号2)]^2001
=(49-50)^2001
=-1