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What is the solution to the equation 5x^2 - 20 = 0?

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Question: What is the solution to the equation 5x^2 - 20 = 0?

Options:

  1. x = 2
  2. x = -2
  3. x = 4
  4. x = -4

Correct Answer: x = 4

Solution: 

First, add 20 to both sides: 5x^2 = 20. Then divide by 5: x^2 = 4. Taking the square root gives x = 4 and x = -4.

What is the solution to the equation 5x^2 - 20 = 0?

Practice Questions

Q1
What is the solution to the equation 5x^2 - 20 = 0?
  1. x = 2
  2. x = -2
  3. x = 4
  4. x = -4

Questions & Step-by-Step Solutions

What is the solution to the equation 5x^2 - 20 = 0?
  • Step 1: Start with the equation 5x^2 - 20 = 0.
  • Step 2: Add 20 to both sides of the equation to get 5x^2 = 20.
  • Step 3: Divide both sides by 5 to simplify the equation to x^2 = 4.
  • Step 4: Take the square root of both sides. This gives you two solutions: x = 4 and x = -4.
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