Réponse :
bonjour
Explications étape par étape :
A = 3x² + 6x
=3x(x+2)
B = 36 - 6x
=6(6-x)
C=(x-3)(x - 2) + 5(x - 3)
=(x+3) (x-2+5)
=(x+3)(x+2)
D = (2x - 5)(7x + 5) - (2x - 5)²
=(2x-5) (7x+5-1)
=2x+5)(7x+4)
E = 5 - 9x + (5 - 9x)(1 - 3x)
= (-9x+5) (-3x+1)
F= x²-100
=(x-10)(x+10)
G = 25x²+ 16 - 40x
(5x-4)²
H= (x-4)² - 25
(x-4-5)(x-4+5)
(x-9)(x+1)
I= 121 - 36x²
(11-6x)(11+6x)
J= (4x - 3)²-(7x +6)²
=(4x-3-7x-6) (4x-3+7x+6)
=(-3x-9)(11x+3)
K= 9- (5x + 1)²
=(3-5x-1) (3+5x+1)
= (-5x+2)(5x+4)
L = (2x + 1)²-(3x - 8)²
=(2x+1-3x+8) (2x+1+3x-8)
=(-x+9)(5x-7)
