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(5+x)2=25+10x+x2
(6a+b)2=36a2+12ab+b2
(9+4m)2=81+72m+16m2
(7x+11)2=49x2+154x+121
2._(a+2)al cuadrado= a cuadrado + 4a + 4
3._(a-2) al cuadrado= a cuadrado + 4a + 4
4._(a+1)al cubo= a cubo + 3a cuadrado + 3a + 1
5._(a+b+c)=a cuadrado + b cuadrado + c cuadrado + 2(ab+bc+cd)