Solve the following equations by either completing the square or using the quadratic formula. Work the problems on your own paper, then check your answers by clicking on "Solution."

  1. x2 + 8x + 12 = 0
  2. 2x2 – 5x – 3 = 0
  3. x2 – 5x = -4
  4. 4x2 + 4x = 22
  5. 4x2 + 4x = 3

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1. Solution

-6, -2 Close Pop Up

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2. Solution

-0.5, 3 Close Pop Up

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3. Solution

1, 4 Close Pop Up

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4. Solution

-2.90, 1.90 Close Pop Up

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5. Solution

-1.5, 0.5 Close Pop Up

In your notes, explain why you would select one of these methods over the other when solving a quadratic equation.