Réponses

2014-02-06T18:03:08+01:00
Bonsoir

A= 12x²-30x =  6x(2x -5)
B=14p²+7 = 7(2p² +1)
C=3(2x+3)-5x(2x+3) = (2x+3)( 3 -5x)
D= (x+5)(2x+6)+(x+5)(4-3x) = (x+5)(2x+6 + 4-3x) = (x+5)(-x +10)
E=(4x-5)²-(2x-3)(4x-5)
= (4x-5)(4x-5 -2x +3) = (4x-5)(2x -2)