Réponse:

Bonjour

exercice 7 :

-24y-24 → -24(y+1)

-4y+24 → -4(y-6)

4y-24 → 4(y-6)

-4y²+24y → -4y(y-6)

-4y²-24 → -4(y²+6)

exercice 8 :

N = 4a² + 3a

= a (4a+3)

P = 2b² + b

= b(2b +b)

Q = 6c +7c²

= c(6+7c)

R = -8d +5d²

= d(-8+5d)

S= a-6a²

= a(1-6a)

T = 5b -4b²

= b(5-4b)

U = 10c² -9c

= c(10c-9)

V = -3d²-7d

= d(-3d-7)

salut.

exo 7:

-24y-24= -24(y+1)

-4y+24= -4(y-6)

4y-24= 4(y-6)

-4y²+24y= -4(y-6)

-4y²-24= -4(y²+6)

exo8:

N= 4a²+3a

N= a(4a+3)

P= 2b²+b

P= b(2b+1)

Q= 6c+7c²

Q= c(6+7c)

R= -8d+5d²

R= -d(8-5d)

S= a-6a²

S= a(1-6a)

T= 5b-4b²

T= b(5-4b)

U= 10c²-9c

U= c(10c-9)

V= -3d²-7d = -d(3d+7) . voilà !