aratati ca 2011 la a doua minus 2011 minus 2010 este patrat perfect


Răspuns :

[tex]2011^2-2011-2010= 2011(2011-1)-2010 = \\ \\ = 2011*2010-2010= \\ \\ =2010(2011-1)= \\ \\ =2010*2010= \\ \\ =\boxed{2010^2-este \ p.p}[/tex]
  
[tex] 2011^{2} -2011 - 2010 = \\ = 2011(2011 - 1) - 2010 = \\ =2011 * 2010 - 2010= \\ =2010(2011-1)= \\ =2010*2010 = \\ = 2010^{2} \\ cctd [/tex]