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Bonsoir qui pourrais m’aider ?merci d’avance
1. Factoriser
2. Développer
A = 49x2 - 100
C = (3x – 7)
B = (2x - 5)2 – 36
D = (4x - 1) (4x + 1)

Sagot :

Bonsoir,

A = 49x² - 100

(7x -10) ( 7x+10 ) = 49x² - 10

C = (3x – 7)

pas de factorisation

ni de dévelopement

B = (2x - 5)² – 36

(2x-5-6) (2x-5+6)  = (2x -11) ( 2x+1)

= 4x² +2x -22x -11 = 4x² -20x -11

D = (4x - 1) (4x + 1)

16x² -1

16x² +4x -4x -1 = 16x² -1

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