Réponses

2014-05-05T09:03:46+02:00
1.
(3x+\sqrt{2})^{2}=9x^{2}+2*3x*\sqrt{2}+2=9x^{2}+6\sqrt{2}x+2

2.
X=875683²-875684x875682
X=875683²-(875683+1)(875683-1)
X=875683²-(875683²-1)
X=1

3.
E=(2x-3)²+(3-2x)(x-1)-6+4x
E=(2x-3)²+(2x-3)(1-x)+2(2x-3)
E=(2x-3)((2x-3)+(1-x)+2)
E=(2x-3)(2x-3+1-x+2)
E=(2x-3)(x)
E=x(2x-3)

F=(a+2)²-4(5a-3)²
F=(a+2+2(5a-3))(a+2-2(5a-3))
F=(a+2+10a-6)(a+2-10a+6)
F=(11a-4)(8-9a)

G= a^{4} -1
G=(a²-1)(a²+1)
G=(a+1)(a-1)(a²+1)