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Quadratic Equations (Grade 9)

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Quadratic Equations

1. 
The graph of a quadratic function is called a(n)
  1. line
  2. hyperbola
  3. cubic
  4. parabola
2. 
Which of the following is a quadratic function?
  1. [math]f(x)= x^3 + 5x[/math]
  2. [math]f(x)= x-5x[/math]
  3. [math]f(x) = x-9[/math]
  4. [math]f(x) = x^2+3x + 6 [/math]
3. 
Solve for x
[math]x^2 + x=12[/math]
  1. 6,-2
  2. -3,-4
  3. -4,3
  4. -2,6
4. 
Find the solution of the following equation.

[math]x^2 - 3x - 40 = 0[/math]
  1. x = -5, -8
  2. x = -5, 8
  3. x = 5, -8
  4. x = 5, 8
5. 
[math]2x^2 - x - 3 = 0[/math]
  1. [math]3, -1[/math]
  2. [math]-1, 3/2[/math]
  3. [math]-1, 3[/math]
  4. [math]1/2, 3[/math]
6. 
[math]b^2+8b +7 = 0[/math]
  1. 1 and -7
  2. 1 and 8
  3. 1 and 7
  4. -1 and -7
7. 
[math]x^2 + x - 6=0[/math]
  1. 4,-1
  2. 3,-2
  3. -6,1
  4. 2,-3
8. 
Which expression has only one solution?
  1. [math]x^2 - x - 20[/math]
  2. [math]x^2 + 10x + 7[/math]
  3. [math]x^2 - 12x + 36[/math]
  4. [math]x^2 + 13x + 42 [/math]
9. 
Complete the square. (Do not solve for x.)
[math]x^2 + 10x + ? [/math]
  1. no answer available
  2. [math]100[/math]
  3. [math]25/2[/math]
  4. 25
  5. [math]25/4[/math]
10. 
Graph the following equation:
[math]f(x) = x^2 - 3[/math]
Graph 10x10



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