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H = -31-42 - 2
Exercice 4
Développer et réduire les expressions suivantes :
A = (-83 - 9) (5x + 6)
B=(-6 x-7)(-51 – 7)
C = (-9x - 3)(-10% - 4)
D= (-2x - 1)(-7x+3)
E= (-32-7)(-5x + 5)
F = (2x - 8) (3x - 3)
Exercice 5
Réduire, si possible, les expressions suivantes :
1. A = -2n2 x (-9)
2. B = -97 x 6y
3. C= -2 t x 5
4. D = -7.2 x (-2)
5. E= 7 s - 4s
6. F=3 X 482
7. G = 92 x 2
8. H = 7 x 622
9. I = -6t-4t
Exercice 6
Développer et réduire les expressions suivantes :
A = -6 6 2 - 10)
B = (x + 7) (-8x)
C = (-8x+6) (-6)
D=(-10% +9) x 6 x
E= -3(93 + 10)
F=9(4x - 10)
G=(-82-2) 100
H = 9(41 - 2)​

Sagot :

Réponse:

H= - 75

A= - 92 (5X + 6)

= - 460X - 522

B = (-6X - 7) (5X + 6 )

= -30X² - 42

C= (-9 X -7)(-10% - 4)

= + 90% X + 28

D= ( -2X -1)(-7X + 3)

= 14X² - 3

--------------------------------

A= - 2n² X(-9)

= 18n²

B= -97 x 6y

= - 592 y

C= - 2t x 5

= - 10t

D= - 7,2 x (-2)

= 14.4

E= 7s - 4s

= 3s

F= 3 x 482 = 1646

H= 7 x 622= 4354

G= 92 x 2 = 184

I= - 6t - 4t = - 10t

------------------------------

A= -662 - 10 = -672

B= - 8X² - 56X

C= 48X -36

D= -60%X + 54X

E= -3(93 +10) = -279 -30 = - 309

F= 9(4X - 10)

= 36X -90

G= (-82-2)100

= (-84)100 = - 8400

H= 9(41-2) = 9(39)= 351

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