Mathematics

9th -

11thgrade

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Solving Quadratic Equations by Completing the Square

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15 questions

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  • 1. Multiple Choice
    5 minutes
    1 pt
    What is the first step to solving THIS equation by completing the square?
    a2 + 10a + 21 = 0
    Set the equation equal to zero
    Divide 10 by 2 and add the result to both sides
    Add a2 and 10a together
    Subtract the 21
  • 2. Multiple Choice
    5 minutes
    1 pt

    Complete the Square

    x2 + 6x - 5

    (x + 3)2 = 5

    (x + 6)2 = 9

    (x + 3)2 = 14

    (x + 6)2 = 14

  • 3. Multiple Choice
    5 minutes
    1 pt
    When factoring
    x2 - 4x + 4 = 20,
    what goes in the blank?
    (x - __ )2 = 20
    4
    2
    8
    20
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