Exercice :
Factoriser les expressions suivantes :
1. 
2.
3. 
4. 
5. 
6. 
1.
2.
C = 10(2x + 1)^2 – (x-1)(2x+1)
C = (2x + 1) \left\lbrack 10 (2x + 1) – (x – 1) \right\rbrackC = (2x + 1)(20x +10 -s +1)C = (2x + 1)(19x +11)
D = 16x^2 – 8x + 1D = (4x)^2 – 2\times 4x \times 1 + 1^2D = (4x – 1)^2$
