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3-Cm24 2011-2012

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3-Cm24 2011-2012

1. 1. Calcul mentalRésolution d’inéquation et d’équation Série n°4
2. 2. Diapositive 1Résoudre l’inéquation : - 6x < 36 −
3. 3. Diapositive 2Résoudre l’équation :x² + 6x +9=0
4. 4. Diapositive 3Résoudre l’inéquation :4 - 3x ≤ 6
5. 5. Diapositive 4Factoriser :x² - 14x + 49
6. 6. Diapositive 5Résoudre l’équation :(x - 5)(7x + 1) = 0
7. 7. FIN
8. 8. CORRECTION
9. 9. - 6x < 36Diapositive 1 x > 36 : (-6) − x>-6
10. 10. Diapositive 2x² + 6x +9=0(x + 3)² = 0Donc x = -3
11. 11. Diapositive 3 4 - 3x ≤ 6 -3x ≤ 6 - 4 -3x ≤ 2 x ≥ -2/3
12. 12. Diapositive 4x² - 14x +49= (x - 7)²
13. 13. Diapositive 5(x - 5)(7x + 1) = 0 x - 5=0 ou 7x + 1=0DoncDonc x = 5 ou x = -1:7Donc x = 5 ou x = -1/7