Réponses

2012-11-08T17:15:27+01:00

(x-1)²-5+2x=0

x²-1-5+2x=0

x²+2x-6+6=0+6 

x²+2x=6

x²+(2x/2)=6/2

x²+x=3

x + x =\sqrt{3}

2x=\sqrt{3}

x=\sqrt{3}/2