Verified answer

Réponse :

bonjour

F =  6 x - 7 - 3 + 4 x

=  10 x - 10

= 10 ( x - 1 )

G = - 8 x² - 7 x - 6 + 3 x² - 6 x - 3

= - 5 x² - 13 x - 9

H = a² + 2 a + 7 a + 14

= a² + 9 a + 14

J =  15 x - 20 + 6 x² - 8 x

= 6 x² + 7 x - 20

K =  - 12 t² + 40 t - 6 t + 20

= - 12 t² + 34 t + 20

4

4 + 5 = 9

9 x - 3 = - 2 7

- 27  + 12 = - 15

- 2

- 2 + 5 = 3

3 x - 3 = - 9

- 9  - 6 = - 15

x

x + 5

- 3 ( x + 5)= - 3 x - 15

- 3 x - 15 + 3 x

15

tions étape par étape

exercice 3 :

F = (6x-7)-(3-4x)

= 6x-7-3+4x

= 10x-10

G= -(8x^2+7x)+(-6+3x^2)+(-6x-3)

= -8x^2-7x-6+3x^2-6x-3

= -5x^2-13x-9

exercice 4 :

H= (a+7)(a+2)

= a^2+2a+7a+14

= a^2+9a+14

J= (5+2x)(3x-4)

= 15x-20+6x^2-8x

= 6x^2+7x-20

K= (-4t-2)(3t-10)

= -12t^2+40t-6t+20

= -12t^2+34t+20

L= (x+9)(5x-3)+4(2x-5)

= 5x^2-3x+45x-27+8x-20

= 5x^2+50x-47

exercice 5 :

a. •4

•4+5=9

•9×(-3)=-27

•-27+4×3=-15

•-2

•-2+5=3

•3×(-3)=-9

•-9+(-2)×3=-15

b. cest le même résultat

c. je ne sais pas desole