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Answered

Bonsoir pouvez m’aider à résoudre les équations svp merci bcp
1. 8x -7=0
2.x2= 21
3. (x+7)(x-3)= 0
4.(x-4)-(2x +9)=0
5.x2 + 5x -2=x2 - 4x +7
6(x+5)+(x-5)=0
7.(2x+13)(-7x+11)= 0
8.3(7x + 12)+(x+4)(x-4)=x2-1

Sagot :

DGESSON

Réponse:

1) x = 7/8

2) x = √21. x = - √21

3) x = 3. x = - 7

4) x = - 13

5) x = 1

6) x = 0

7) x = 11/7. x = - 13/2

8) x = -1

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