Réponses

2013-02-09T18:54:52+01:00
A = ( 3X x X + 3 X x 4 - 1x - 1 + 4) - 5 x 3X - 5 x (-1) ^2 B = ( 2x x 2+5 -3x x x - 3x + 5 ) - ( 5x x 3x + 5x -2 + 4 x 3x + 4 x (-2)) C tu fais comme le B
2013-02-09T18:57:01+01:00

(3x-) (( x+4 -5(3x-1) = (3x-1) ( x+4 - 15x +5 ) = (3x-1) (-14x+9)

B = (2-3X)(x+5)-(5x+4)(3x-2)