What is the solution to the equation 4x^2 - 12x + 9 = 0?

Practice Questions

Q1
What is the solution to the equation 4x^2 - 12x + 9 = 0?
  1. x = 1
  2. x = 2
  3. x = 3
  4. x = 4

Questions & Step-by-Step Solutions

What is the solution to the equation 4x^2 - 12x + 9 = 0?
  • Step 1: Start with the equation 4x^2 - 12x + 9 = 0.
  • Step 2: Identify the coefficients: a = 4, b = -12, c = 9.
  • Step 3: Look for two numbers that multiply to (a * c) = 4 * 9 = 36 and add to b = -12.
  • Step 4: The numbers -6 and -6 work because -6 * -6 = 36 and -6 + -6 = -12.
  • Step 5: Rewrite the equation using these numbers: 4x^2 - 6x - 6x + 9 = 0.
  • Step 6: Group the terms: (4x^2 - 6x) + (-6x + 9) = 0.
  • Step 7: Factor out common terms: 2x(2x - 3) - 3(2x - 3) = 0.
  • Step 8: Factor by grouping: (2x - 3)(2x - 3) = 0.
  • Step 9: Set each factor equal to zero: 2x - 3 = 0.
  • Step 10: Solve for x: 2x = 3, so x = 3/2.
  • Step 11: Since both factors are the same, the solution is x = 3/2.
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