What is the vertex of the parabola represented by the equation y = 2x^2 - 8x + 5

Practice Questions

Q1
What is the vertex of the parabola represented by the equation y = 2x^2 - 8x + 5?
  1. (2, -3)
  2. (2, -7)
  3. (4, -3)
  4. (4, -7)

Questions & Step-by-Step Solutions

What is the vertex of the parabola represented by the equation y = 2x^2 - 8x + 5?
Correct Answer: (4, -3)
  • Step 1: Identify the coefficients from the equation y = 2x^2 - 8x + 5. Here, a = 2, b = -8, and c = 5.
  • Step 2: Use the formula for the x-coordinate of the vertex, which is x = -b/(2a).
  • Step 3: Substitute the values of a and b into the formula: x = -(-8)/(2*2).
  • Step 4: Simplify the calculation: x = 8/4 = 2.
  • Step 5: Now, substitute x = 2 back into the original equation to find the y-coordinate: y = 2(2^2) - 8(2) + 5.
  • Step 6: Calculate y: y = 2(4) - 16 + 5 = 8 - 16 + 5 = -3.
  • Step 7: The vertex of the parabola is (2, -3).
No concepts available.
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely