Aider moi svp j’ai besoin d’aide 1) Développer puis réduire : A = 3 (x +2); B = (-7) (6-2t) ; C = 5 (4a - 2); D = Z (22 - 4); E = 7t (5 -2t); F = a (2-a) G = 5t

Réponse :

Explications étape par étape :

A=3 (x +2)

A=3×x+3×2

A=3x+6

B = (-7) (6-2t)

B = (-7)×6 - (-7)×(2t)

B = (-42) - (-14t) = (-42) +14t

C = 5 (4a - 2)

C = 5 × 4a - 5×2

C = 20a - 10

D = Z (22 - 4)

D = Z × 22 -  Z × 4

D = 22Z - 4Z

D = 18Z

E = 7t (5 -2t)

E = 7t × 5 - 7t × 2t

E = 35t - 14t²

F = a (2-a)

F = a × 2 - a×a

F = 2a - a²

G = 5t (4 + 2t)

G = 5t × 4 + 5t × 2t

G = 20t + 10t²

H = 5 (3-2w)

H = 5 × 3- 5×2w

H = 15 - 10w

I = (-2t) (4 – 5t)

I = (-2t) × 4 – (-2t) ×5t

I = (-8t) - (-10t)² = (-8t) + 10t²

J = 7a (9-8a)

J = 7a × 9- 7a×8a

J = 63a - 56a²

K = -6 (3 +4a)

K = -6×3 + (-6)×4a

K = -18 + (-24a) = -18 - 24a