Réponses

2014-02-05T20:12:34+01:00
Bonsoir

D = ( 7x - 1 ) ( 2x + 1 ) + ( 2x + 1 ) ( 3x - 4 )
(2x+1)(7x-1 +3x-4)
(2x+1)(10x -5)

E = ( 3p - 4 ) ( p + 1 ) - ( 9p + 6 )
p((3 -4)(1 -  9 +6)
p( -1)(-2)

F = 2 (5s + 2) + (5s + 2 )²
(5s+2) (2 +5s+2)
(5s+2)(5s+4)

G = ( 7r - 2)² - (2r + 3)²
(7r -2 +2r +3)(7r -2 -2r -3)
(9r +1)(5r -5)

H = 81 - ( 7 k + 2)²
(9 - 7k -2)(9 +7k+2)
(-7k +7)( 7k +11)