Réponses

2013-02-21T20:31:13+01:00
1) ter= x^2/2 gef=(x+5)^2/2. 2) cherche x tq ter=1/4gef x^2/2 = 1/4 * (x+5)^2/2 2x^2=1/2*(x+5)^2. 4x^2-(x+5)^2=0. 3) A=(2x+(x+5))*(2x-(x+5)) = (3x+5)(x-5). 4) x=5 ou -5/3