Réponses

2013-10-26T20:26:44+02:00
2(X+1)² + 2X(X-5)
=2(x²+2x+1)+2x²-10x
=2x²+4x+2+2x²-10x
=4x²-6x+2
2013-10-26T20:34:55+02:00
2(X+1)² + 2x*(X-5)= 2( x^{2} +2x*1+ 1^{2} )+2 x^{2} -10x
                        = 2 x^{2} +4x+2+2 x^{2} -10x
                        =4 x^{2} -6x+2