Développer puis réduire les expresion Exercice 1: A = (x+4) (x+3) B = (y + 3) (2y + 8) C = (3z + 4) (562) D= (-7t+8)(3 - 5t) E = (7 + 3x) (9x - 3) F = (-2-3y) (

Explications étape par étape:

Exercice 1:

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

A = x²+3x+4x+12

A = x²+7x+12

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

B = 2y²+8y+6y+24

B = 2y²+14y+24

C = (3z + 4) (562)

C = 1686z+2248

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

D = -21t+35t²+24-40t

D = 35t²-61t+24

E = (7 + 3x) (9x - 3)

E = 63x-21+27x²-9x

E = 27x²+54x-21

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

F = -8+16y-12y+24y²

F = 24y²+4y-8

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

G = -12a+20a²-18-30a

G = 20a²-42a-18

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

H = 40z²+10z-56z-14

H = 40z²-46z-14