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  • Solving Quadratic Equations
Test Title:

Solving Quadratic Equations

There are 3 tests inside this topic. Click the button below to change currently active quiz.

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Current: Solve quadratic equations by completing the square
  • Q1:
    1 pts
    The trinomial $x^2-16x+4$ is a perfect square.
  • Q2:
    1 pts
    What number must be added in the expression $x^2+4x+?$ to make a perfect square trinomial:

    ? = 16

    ? = 2

    ? = 4

    ? = 8

  • Q3:
    1 pts
    What number must be added in the expression $x^2-20x+?$ to make a perfect square trinomial:

    ? = 10

    ? = 20

    ? = 100

    ? = 400

  • Q4:
    1 pts
    What number must be added in the expression $x^2-10x+?$ to make a perfect square trinomial:

    ? = 5

    ? = 10

    ? = 25

    ? = 50

  • Q5:
    2 pts
    Solve $x^2+4x=0$ by completing the square.
    $x_1=0, x_2=4$
    $x_1=2, x_2=4$
    $x_1=0, x_2=-4$
  • Q6:
    2 pts
    Solve $x^2+6x=7$ by completing the square.
    $x_1=1, x_2=-7$
    $x_1=-1, x_2=7$
    $x_1=-1, x_2=-7$
    $x_1=1, x_2=7$
  • Q7:
    3 pts
    Solve $x^2+2x= -2$ by completing the square.
    $x_1=1, x_2=-1$
    $x_1=-i, x_2=i$
    $x_1=-1+i, x_2=-1-i$
    $x_1=1+i, x_2=1-i$
  • Q8:
    3 pts
    Solve $x^2-5x= 14$ by completing the square.
    $x_1=-2, x_2=7$
    $x_1=2, x_2=-7$
    $x_1=2/7, x_2=-7/2$
  • Q9:
    3 pts
    Solve $2x^2+5x-7=0$ by completing the square.
    $x_1=-1, x_2=-7/2$
    $x_1=1, x_2=-7/2$
    $x_1=1, x_2=7/2$
    $x_1=-1, x_2=7/2$