Bonsoir besoin d’aide pour l’exercice 32 et 33 merci ^^

Bonsoir,

Exercice 32 :

A = (x+4)(x+3)

= x² + 4x + 3x + 12

= x² + 7x + 12

B = (y+3)(2y+8)

= 2y² + 8y + 6y + 24

= 2y² + 14y + 24

C = (3z+4)(5+6z)

= 15z + 18z² + 20 + 24z

= 18z² + 39z + 20

D = (7t+8)(3+5t)

= 21t + 35t² + 24 + 40t

= 35t² + 61t + 24

Exercice 33 :

A = (7-3x)(9x-3)

= 63x - 21 - 27x² + 9x

= -27x² + 72x  - 21

B = (-2-3y)(4-8y)

= -8 + 16y - 12y + 24y²

= 24y² + 4y - 8

C = (4a+6)(-3-5a)

= -12a -20a² - 18 -30a

= -20a² - 42a - 18

D = (5z-7)(8z+2)

= 40z² + 10z - 56z - 14

= 40z² - 46z - 14

Bonsoir,

32)

A = (x + 4)(x + 3) = x² + 3x + 4x + 12 = x² + 7x + 12

B = (y + 3)(2y + 8) = 2y² + 8y + 6y + 24 = 2y² + 14y + 24

C = (3z + 4)(5 + 6z) = 15z + 18z² + 20 + 24z = 39z + 18z² + 20

D = (7t + 8)(3 + 5t) = 21t + 35t² + 24 + 40t = 61t + 35t² + 24

33)

A = (7 - 3x)(9x - 3) = 63x - 21 - 27x² + 9x = 72x - 21 - 27x²

B = (-2 - 3y)(4 - 8y) = -8 + 16y - 12y + 24y² = 4y - 8 + 24y²

C = (4a + 6)(-3 - 5a) = -12a - 20a² - 18 - 30a = ....

Je te laisse terminer ^^