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Which of the following is a solution to the equation x^2 + 2x - 8 = 0?

Practice Questions

Q1
Which of the following is a solution to the equation x^2 + 2x - 8 = 0?
  1. -4
  2. 2
  3. 0
  4. 4

Questions & Step-by-Step Solutions

Which of the following is a solution to the equation x^2 + 2x - 8 = 0?
  • Step 1: Start with the equation x^2 + 2x - 8 = 0.
  • Step 2: Look for two numbers that multiply to -8 (the last number) and add to 2 (the middle number).
  • Step 3: The numbers that work are 4 and -2 because 4 * -2 = -8 and 4 + (-2) = 2.
  • Step 4: Rewrite the equation using these numbers: (x + 4)(x - 2) = 0.
  • Step 5: Set each factor equal to zero: x + 4 = 0 and x - 2 = 0.
  • Step 6: Solve for x in each equation: For x + 4 = 0, x = -4; for x - 2 = 0, x = 2.
  • Step 7: The solutions to the equation are x = -4 and x = 2.
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