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Quadratic Roots - Practice #2

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Quadratic Roots - Practice #2 Answer Key

1. 
Find the roots. [math]x^2 + 8x + 12 = 0[/math]
  1. 2, -6
  2. -2, 6
  3. -2, -6
  4. 2, 6
2. 
Find the roots of [math]x^2 - 5x - 6 = 0.[/math]
  1. -1, 6
  2. -3, 2
  3. -6, 1
  4. -2, 3
3. 
Which quadratic equation has roots -2 and 3?
  1. [math]x^2+x+6=0[/math]
  2. [math]x^2-x-6=0[/math]
  3. [math]x^2-6x+1=0[/math]
  4. [math]x^2+x-6=0[/math]
4. 
Find the roots of [math]x^2 - 8x + 15 = 0.[/math]
  1. 3, 5
  2. -3, 5
  3. 3, -5
  4. -3, -5
5. 
Find the roots. [math]-2x^2 + 6x + 56 = 0[/math]
  1. 4, 7
  2. -4, -7
  3. -4, 7
  4. 4, -7
6. 
Which equation has roots at -6 and [math]1/5[/math] ?
  1. [math]0=5x^2-29x-6[/math]
  2. [math]0=5x^2+31x+6[/math]
  3. [math]0=5x^2+29x-6[/math]
  4. [math]0=5x^2-31x+6[/math]
7. 
Find the roots. [math]x^2 + 10x - 11 = 0[/math]
  1. 1, -11
  2. -1, 11
  3. 1, 11
  4. -1, -11
8. 
Find the roots of [math]2x^2 + 5x - 3 = 0.[/math]
  1. -2, 3
  2. 2, -3
  3. 1/2, -3
  4. -1/2, 3
9. 
What are the roots of the equation [math](x-2)(x+5)=0[/math]?
  1. 2 and 5
  2. 2 and -5
  3. -2 and -5
  4. -2 and 5
10. 
Find the roots. [math]x^2 -x - 72= 0[/math]
  1. 8, 9
  2. -8, -9
  3. -8, 9
  4. 8, -9
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