Pouvez vous m’aider pour cet exercice. Merci d’avance

Exercice 1
Résoudre les équations suivantes :
4x = 12
-&r= 34
x+8 = 15
X-5 = 15
3.x - 7= 23
-3.r + 2 = -19
5x - 8 = -10
4x - 7 = 2x + 13
-Gr + 3 = 3.x + 15
-7x + 8 = -4x + 12
(3.x - 6)(2x + 8) = 0
(5.x - 10)(3.x + 15) = 0
x(3.x - 7)(-2x + 4) = 0
(6x - 7)(-3.x - 9) = 0
r = 16
x = 15
19 + x2 = 100
3.x2 = 27
Exercise 3


Sagot :

VINS

Réponse :

bonjour

4 x = 12

x = 3

- &r = ?

x + 8 = 15

x = 15 - 8

x = 7

x- 5 = 15

x = 20

3 x - 7 = 23

3 x = 30

x = 10

- 3 r + 2 = - 19

- 3 r = - 19 - 2

- 3 r = - 21

r = 7

5 x - 8 = - 10

5 x = - 10 + 8

5 x = - 2

x = - 2/5

4 x - 7 = 2 x + 13

4 x - 2 x = 13 + 7

2 x = 20

x = 10

- Gr  ?

- 7 x + 8 = - 4 x + 12

- 7 x + 4 x = 12 - 8

- 3 x = 4

x = - 4/3

( 3 x - 6 ) ( 2 x + 8 ) = 0

x =  6/3 = 2 ou  x = -  8/2 = - 4

( 5 x - 10 ) ( 3 x + 15 ) = 0

x = 10/5 = 2 ou  x = - 15/3 = - 5

x ( 3 x - 7 ) ( - 2 x + 4 ) = 0

x = 0 ou x = 7/3 ou x =  - 2

( 6 x - 7 ) ( - 3 x - 9 ) = 0

x = 7/6 ou  - 3

r =  16

x = 15

19 + x² = 100

x² = 100 - 19

x² = 81

x = √81 ou - √81

x = 9 ou -  9

3 x² = 27

x² = 9

x =  √9 ou - √9

x = 3 ou - 3

Explications étape par étape