Répondre :
E = 30a + 36a²
=6a(5+6a)
F = -9y² - 9
=-9(y²+1)
Reconnaitre un identité remarquable et factoriser :
D = 25 - 100y²
=(5+10y)(5-10y)
E = 36y² - 1
=(6y+1)(6y-1)
F = 64 - 80y + 25y²
=(8-5y)²
=6a(5+6a)
F = -9y² - 9
=-9(y²+1)
Reconnaitre un identité remarquable et factoriser :
D = 25 - 100y²
=(5+10y)(5-10y)
E = 36y² - 1
=(6y+1)(6y-1)
F = 64 - 80y + 25y²
=(8-5y)²