Bonjour
Consigne : factoriser les expressions en repérant un facteur commun
a. x(2x + 5)+(3x - 1)(2x + 5)
= (2x + 5) (3x - 1 + x)
= (2x + 5) (4x - 1)
b. (2x+3)(x-6)-(x-6)²
= (x - 6) (2x + 3 - x + 6)
= (x - 6) (x + 9)
c. 4(3z-5)² - 2z(3z-5)
= 10(z - 2) (3z - 5)
d. (3t-5)²+(3t-5)(3t+5)
= 6t (3t - 5).
