Bonsoir

x = -2 ; y = -3 ; z = - 5

P = -9xy = -9(-2)(-3) = -9(6) = -54

Q = -2(3x-z) = -2(3(-2)-(-5)) = -2(-6+5) = -2(-1) = 2

R = -4x(y+z) = -4(-2)(-3-5) = 8(-8) = -64

Réponse :

Explications étape par étape

Coucou,

On a déjà : x = -2

y = -3

z = -5

Rappel : xy = x*y

---

P = - 9xy = -9(-2)(-3)

= -9*(6) = -54

Q = -2 (3x-z) = -2 (3 (-2) - (-5) )

= -2 (-6+5) = -2(-1) = 2

R = -4x (y+z) = -4 (-2)(-3-5)

= 8 (-8) = -64

Voila ;)