, , . : 6 = 1 + 2 + 3.
, 31- , : (22216091 1)22216090. 1985 . () 22216091 1, .

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18.03.2013

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(x2 - )2.

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:

(x2 - )2 = (x2)2 - 2x2 + ()2 = x4 - 2x2 + 5.

: x4 - 2x2 + 5.


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