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Meilleure réponse !
2013-12-04T14:05:47+01:00
Bonjour
A= 100x²-64 = (10x - 8)(10x+8)
B = 64x²+112x+49 = (8x+7)²
C = 9-(3x-2)² = 3² - (3x-2)² = (3-3x+2)(3+3x-2) = (5-3x)(1+3x)
D = (x-3)²-100 = (x-3)²-10² = (x-3-10)(x-3+10) = (x-13)(x+7)
2013-12-04T14:06:38+01:00
A = -64+100x²
A = (10x-8)(10x+8)

B = 112x+49+64x²
B = (8x+7)²

C = 9-(3x-2)²
C = ((-3x-2)-3)((3x-2)+3)
C = (-3x+5)(3x+1)

D = (x-3)²-100
D = ((x-3)-10)((x-3)+10)
D = (x-13)(x+7)