Réponses

2014-03-23T13:44:39+01:00
A) 4x²+4x+4 = (2x+2)²      ou 4(x²+x+1)

b) -5x²+10x+15 = -5(x-3)(x+1)

c) 9y²-3y+27 = 3(3y²-y+9)

d) 3y^3 +y² = y²(3y+1)
2014-03-23T13:47:07+01:00
A. 4x² + 4x + 4
   4(x²+x+1)
   4[x(x+1)+1]

b. -5x² + 10x + 15
    =5(-x²+2x+3)
    =5[x(-x+2)+3]

c. 9y² - 3y + 27
   =3(3y²-y+9)
   =3[y(3y-1)+9]

d. 3y³ + y²
   =4y
²