Ecuación de Segundo Grado por Factorización
  • 1. x2 + x - 20 =
A) x1 = 4 ; x2 = 5
B) x1 = 5 ; x2 = - 4
C) x1 = - 5 ; x2 = 4
D) x1 = - 4 ; x2 = - 5
  • 2. x2 - 7x = 0
A) x1 = 0 ; x2 = - 7
B) x1 = 0 ; x2 = 7
C) x1 = 0 ; x2 = 0
D) x1 = 1 ; x2 = 7
  • 3. x2 - 121 = 0
A) x1 = 0 ; x2 = 11
B) x1 = - 11 ; x2 = 0
C) x1 = 11 ; x2 = - 11
D) x1 = 13 ; x2 = - 13
  • 4. 2x2 + 8x= 0
A) x1 = 0 ; x2 = - 4
B) x1 = 8 ; x2 = 2
C) x1 = 0 ; x2 = 4
D) x1 = - 2 ; x2 = 8
  • 5. x2 + 15x + 36 =
A) x1 = 12 ; x2 = 3
B) x1 = 9 ; x2 = 4
C) x1 = - 12 ; x2 = - 3
D) x1 = 3 ; x2 = 12
  • 6. x2 - 13x + 42 = 0
A) x1 = - 6 ; x2 = - 7
B) x1 = - 21 ; x2 = 2
C) x1 = 6 ; x2 = 7
D) x1 = 21 ; x2 = 2
  • 7. x2 + 15x - 16 = 0
A) x1 = 8 ; x2 = - 2
B) x1 = 1 ; x2 = 16
C) x1 = - 16 ; x2 = 1
D) x1 = 2 ; x2 = - 8
  • 8. 9x2 - 16 = 0
A) x1 = 4 ; x2 = 3
B) x1 = 3/4 ; x2 = - 3/4
C) x1 = 3 ; x2 = - 4
D) x1 = 4/3 ; x2 = - 4/3
  • 9. x2 - 81 = 0
A) x1 = 0 ; x2 = - 9
B) x1 = - 9 ; x2 = - 9
C) x1 = - 9 ; x2 = 9
D) x1 = 9 ; x2 = 0
  • 10. 7x2 - 5x = 0
A) x1 = - 5/7 ; x2 = 5/7
B) x1 = - 5/7 ; x2 = 0
C) x1 = 5/7 ; x2 = -5/7
D) x1 = 0 ; x2 = 5/7
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