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(a-2x-3)2 -(a +2a -1)2


Răspuns :

[tex](a-2x-3)2 -(a +2a -1)2=\ \textgreater \ \\ 2a-4x-6-(3a-1)2=\ \textgreater \ \\ 2a-4x-6-6a+2=\ \textgreater \ \\ -4a-4x-4 \\ Succes[/tex]