Respuestas

2012-09-14T04:51:15+02:00

(x-y)2= x2 - 2(x) (y) +Y2 

o

(x+3)2 = x2 + 2 (x) (3) +3 elevado(2) 

 

= x2 + 2x*3+9 

=x2 +6x +9

2012-09-14T05:08:05+02:00

(x-2)^2=x^2-2*2x+2^2=x^2-4x+4

(x-3)^3=x^2-2*3x+3^2=x^2-6x+9