Répondre :
C = 8y² - y
=y(8y-1)
D = 14t² +21
=7(2t²+3)
E= 4x(x+1) - (x+1) (x+5)
=(x+1)(4x-x-5)
=(x+1)(3x-5)
=y(8y-1)
D = 14t² +21
=7(2t²+3)
E= 4x(x+1) - (x+1) (x+5)
=(x+1)(4x-x-5)
=(x+1)(3x-5)