• 1. x2+4x-12=0
A) x1=2 x2=-6
B) x1=-2 x2=6
C) x1=2 x2=6
D) x1=-2 x2=-6
  • 2. x2-6x+8=0
A) x1=-4 x2=-2
B) x1=-4 x2=2
C) x1=4 x2=-2
D) x1=4 x2=2
  • 3. x2+3x+2=0
A) x1=1 x2=-2
B) x1=1 x2=2
C) x1=-1 x2=2
D) x1=-1 x2=-2
  • 4. x2-5x-14=0
A) x1=-2 x2=-7
B) x1=-2 x2=7
C) x1=2 x2=7
D) x1=2 x2=-7
  • 5. x2-x-6=0
A) x1=-3 x2=2
B) x1=3 x2=-2
C) x1=-3 x2=-2
D) x1=3 x2=2
  • 6. 2x2+16x=0
A) x1=0 x2=8
B) x1=0 x2=-8
C) x1=-2 x2=-8
D) x1=2 x2=8
  • 7. x2-16x=0
A) x1=0 x2=16
B) x1=1 x2=-16
C) x1=0 x2=-16
D) x1=-1 x2=16
  • 8. x2+5x=0
A) x1=1 x2=-5
B) x1=0 x2=5
C) x1=0 x2=-5
D) x1=1 x2=5
  • 9. x2-7x=0
A) x1=1 x2=7
B) x1=1 x2=-7
C) x1=0 x2=-7
D) x1=0 x2=7
  • 10. 2x2+4x=0
A) x1=2 x2=-2
B) x1=0 x2=-2
C) x1=2 x2=2
D) x1=0 x2=2
  • 11. (x+5)(x-2)=0
A) x1=2 x2=5
B) x1=2 x2=-5
C) x1=-2 x2=5
D) x1=-2 x2=-5
  • 12. 9x2-4=0
A) x2=-0.66 x2=-0.66
B) x1=0.66 x2=-0.66
C) x1=0.66 x2=0.66
D) x1=-0.66 x2=0
  • 13. x2=64
A) x1=-8
B) x1=8
C) x1=32
D) x1=6
  • 14. 5x2=45
A) x1=3 x2=3
B) x1=3 x2=5
C) x1=-3 x2=-3
D) x1=3 x2=-3
  • 15. x2+7x=18
A) x1=9 x2=-2
B) x1=-9 x2=2
C) x1=-9 x2=-2
D) x1=9 x2=2
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