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CALCUL MENTAL

CALCUL MENTAL. 1. Trouver 2 nombres M et N tel que :. M x N = 27 M + N = 12. 2. Trouver 2 nombres M et N tel que:. M x N = -24 M + N = -2. 3. Trouver 2 nombres M et N tel que:. M x N = 43 M + N = 44. 4. Trouver 2 nombres M et N tel que:. M x N = 9 M + N = 6. 5.

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CALCUL MENTAL

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  1. CALCUL MENTAL

  2. 1 Trouver 2 nombres M et N telque: M x N = 27 M + N = 12

  3. 2 Trouver 2 nombres M et N tel que: M x N = -24 M + N = -2

  4. 3 Trouver 2 nombres M et N tel que: M x N = 43 M + N = 44

  5. 4 Trouver 2 nombres M et N tel que: M x N = 9 M + N = 6

  6. 5 Trouver 2 nombres M et N tel que: M x N = 13 M + N = 14

  7. 6 Trouver 2 nombres M et N tel que: M x N = 14 M + N = -9

  8. 7 (3x + 4y)2 Développer

  9. 8 (y + 9)2 Développer

  10. 9 Factoriser 18y5 + 6y3 + 9y2

  11. 10 Factoriser 144x2 25

  12. 11 Factoriser xy2 2xy  24x

  13. 12 Factoriser 42x8 15x3 + 9x7

  14. 13 Factoriser 64x2 225y2

  15. 14 (4y  5)2 Développer

  16. 15 (y  5)2

  17. 16 (3 - y)2 Développer

  18. 17 (9y + 1)2 Développer

  19. 18 (5y  2)2 Développer

  20. 19

  21. 20 (2y  15)2 Développer

  22. 21 Factoriser y2 16x2

  23. 22 Factoriser 81x6 y2

  24. 23 Factoriser 16y2 + 24y4 + 12y6

  25. 24 Factoriser 40xy2 2xy5

  26. 25 Que vaut x ?

  27. 26 Développer

  28. 27 Développer

  29. 28 Développer

  30. 29 (5y + 2)2 Développer

  31. 30 Effectuer

  32. 31 (y + 10)2 Développer

  33. 32 Factoriser

  34. 33 Factoriser y2+ 10y + 21

  35. 34 Factoriser

  36. 35 Factoriser

  37. Réponses • 1) 3 et 9 8) y2+18y+81 • 2) -6 et 4 9)3y2(6y3+2y+3) • 3) 1 et 43 10) (12x+5)(12x-5) • 4) 3 et 3 11) x(y-6)(y+4) • 5) 1 et 13 12)3x3(14x5-5+3x4) • 6) -7 et -2 13) (8x+15y)(8x-15y) • 7) 9x2+24xy+16y2 14)16y2-40y+25

  38. 15) y2-10y+25 22) (9x3+y)(9x3-y) • 16) 9-6y+y2 23) 4y2(4+6y2+3y4) • 17) 81y2+18y+1 24) 2xy2(20-y3) • 18) 25y2-20y+4 25) -5 et 3 • 19) x2-9 26) x2-10x+25 • 20) 4y2-60y+225 27) x2/25+2x+25 • 21) (y+4x)(y-4x) 28) x2/9+x/3+1/4

  39. 29) 25y2+20y+4 • 30) 4x2-25 • 31) y2+20y+100 • 32) (x-9)(x-4) • 33) (y+3)(y+7) • 34) (x+½)(x-½) • 35) (x-25)(x+2)

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