Ecuaciones de segundo grado
  • 1. x2 -5x +6=0
A) x=-3, x=2
B) x=3, x=-2
C) x=-3, x=-2
D) x=3, x=2
  • 2. x2 =-x+6
A) x=-2, x=-3
B) x=2, x=3
C) x=-2, x=3
D) x=2, x=-3
  • 3. x2 +2x=-1
A) x=1, x=1
B) x=1, x=-1
C) x=-1, x=-1
D) x=-2, x=-1
  • 4. x2 +x +1=0
A) x=-2, x=-2
B) x=-2, x=2
C) x=2, x=2
D) No tiene solución en los R
  • 5. 2x2 -7x + 3=0
A) x=3, x=1/2
B) x=-3, x=-1/2
C) x=-3, x=1/2
D) x=3, x=-1/2
  • 6. x2 -5x = 84
A) x=-12, x=-7
B) x=12, x=7
C) x=-12, x=7
D) x=12, x=-7
  • 7. 2x2 + 3x = 27
A) x=3, x=-9/2
B) x=-3, x=-9/2
C) x=-3, x=9/2
D) x=3, x=9/2
  • 8. 4x2 = -7x +2
A) x=1/4, x=2
B) x=1/4, x=-2
C) x=-1/4, x=-2
D) x=-1/4, x=2
  • 9. 18 = 6x +x(x-13)
A) x=-9, x=2
B) x=9, x=2
C) x=9, x=-2
D) x=-9, x=-2
  • 10. x2 + x/2 -1/2 = 0
A) x=1/2, x=1
B) x=-1/2, x=-1
C) x=1/2, x=-1
D) x=-1/2, x=1
  • 11. x2 -1=2(x+5) + 4
A) x=-5, x=3
B) x=5, x=-3
C) x=5, x=3
D) x=-5, x=-3
  • 12. x2 + 5x/12 -1/6 =0
A) x=1/4, x=2/3
B) x=-1/4, x=-2/3
C) x=1/4, x=-2/3
D) x=-1/4, x=2/3
  • 13. x2 -x + 1/4 =x/4
A) x=1, x=1/4
B) x=1, x=-1/4
C) x=-1, x=1/4
D) x=-1, x=-1/4
  • 14. (x2 -1)/3 - (x-1)/6 = 2 + x/9
A) x=-3, x=13/6
B) x=-3, x=-13/6
C) x=3, x=-13/6
D) x=3, x=13/6
  • 15. 4x(x+1)=15
A) x=3/2, x=5/2
B) x=3/2, x=-5/2
C) x=-3/2, x=-5/2
D) x=-3/2, x=5/2
  • 16. x(x-2)=3
A) x=3, x=1
B) x=-3, x=-1
C) x=-3, x=1
D) x=3, x=-1
  • 17. -5x2 -15x+20=0
A) x=-4, x=1
B) x=4, x=1
C) x=-4, x=-1
D) x=4, x=-1
  • 18. -3x2 +9x + 12 = 0
A) x=-1, x=-4
B) x=1, x=-4
C) x=1, x=4
D) x=-1, x=4
  • 19. -2x2 + 10x -12 = 0
A) x=2, x=3
B) x=2, x=-3
C) x=-2, x=-3
D) x=-2, x=3
  • 20. x2 -4x +4=0
A) x=-2, x=-2
B) x=1/2, x=1/2
C) x=2, x=2
D) x=1/2, x=-1/2
  • 21. 18=6x +x(x-13)
A) x=-2, x=-9
B) x=2, x=9
C) x=-1/2, x=9
D) x=-2, x=9
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