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Solving Quadratic Equations - Practice #1

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Solving Quadratic Equations - Practice #1 Answer Key

1. 
What are the solutions to the following equation?
[math]x^2-49=0[/math]
  1. [math]x = 40, \ x = 9[/math]
  2. [math]x = 0, \ x = 49[/math]
  3. [math]x = 7, \ x = -7[/math]
  4. [math]x = 0, \ x = -49[/math]
2. 
What are the solutions for the quadratic equation [math]x^2 + 6x = 16[/math]?
  1. x = -2, -8
  2. x = -2, 8
  3. x = 2, -8
  4. x = 2, 8
3. 
Find the solution of the following: [math]x^2 + 5 = 32[/math].
  1. [math]x = +-9sqrt6[/math]
  2. [math]x = +-3sqrt3[/math]
  3. [math]x = +-sqrt32[/math]
  4. [math]x = +-3sqrt6[/math]
4. 
Solve the quadratic equation [math]x^2+4=104[/math].
  1. [math]x=10[/math]
  2. [math]x=-10[/math]
  3. [math]x=+-10[/math]
  4. None of the above
5. 
Solve using the quadratic formula.
[math]4x^2 = 9[/math]
  1. [math]x = pm 3/2[/math]
  2. [math]x = 2/3[/math]
  3. [math]x = pm 2/3 [/math]
  4. [math]x = -3/2[/math]
6. 
Solve using factoring or the Quadratic Formula.
[math]5x^2 + 8x = 0 [/math]
  1. [math]x=0,8/5 [/math]
  2. [math]x=0,-8/5[/math]
  3. [math]x=-5,-8 [/math]
  4. [math]x=5,8[/math]
7. 
Solve by factoring or by using the Quadratic Formula.
[math]x^2+45x+200=0[/math]
  1. [math]x=-5,-40[/math]
  2. [math]x=5,40[/math]
  3. [math]x=-100,-2[/math]
  4. [math]x=2,100[/math]
8. 
Solve the quadratic equation [math]x^2-256=0[/math].
  1. [math]x=+-16[/math]
  2. [math]x=16[/math]
  3. [math]x=-16[/math]
  4. None of the above
9. 
Solve by factoring or the Quadratic Formula.
[math]x^2 – 6x + 9 = 0[/math]
  1. [math]x = -3[/math]
  2. [math]x = 3[/math]
  3. [math]x = -3, 3[/math]
  4. [math]x = 0[/math]
10. 
Solve the quadratic equation: [math]7x^2+1=29[/math]. What are the two solutions for the quadratic equation?
  1. [math]x=2 or x=-2[/math]
  2. [math]x=2i or x=-2i[/math]
  3. [math]x=-2 or x=-2[/math]
  4. [math]x=2i or x=2i[/math]

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