Réponses

2013-05-16T18:58:13+02:00

(4-x)² = 16²-8x+x
(-2-3y)(4-8y) = -6+16y-12y+24y = 28y-6

 
2013-05-16T18:58:34+02:00

(4 - x)² = 16 - 8x + x²

            = x² - 8x + 16

 

(-2 - 3y)(4 - 8y) = -8 + 16y - 12y + 24y²

                           = 24y² + 16y - 8