Math Problem Statement

To turn the function y = x^2 + 6x into vertex form, you can rewrite it as y = (x + 3)^2 - 9. Then lower the parabola left and right by 2 units to complete where the new vertex and axis of symmetry are.

Solution

The image appears to show a math problem about finding the vertex form of a parabola. The problem states:

"To turn the function y=x2+6xy = x^2 + 6x into vertex form, you can rewrite it as y=(x+3)29y = (x + 3)^2 - 9. Then, lower the parabola left and right by 2 units to complete where the new vertex and axis of symmetry are."

Let's go through how to complete the square to rewrite the given equation y=x2+6xy = x^2 + 6x into vertex form and find the vertex and axis of symmetry.

Step-by-Step Solution

  1. Original Equation: y=x2+6xy = x^2 + 6x

  2. Complete the Square:

    • Add and subtract the square of half the coefficient of xx inside the equation:
    • Half of 6 is 3, and 32=93^2 = 9.
    • Rewrite the equation: y=x2+6x+99y = x^2 + 6x + 9 - 9
    • Factor the perfect square: y=(x+3)29y = (x + 3)^2 - 9
  3. Adjusting for Vertex Shift:

    • According to the instructions, lower the parabola left and right by 2 units. This suggests shifting the graph vertically.
    • So, adjust y=(x+3)29y = (x + 3)^2 - 9 by adding or subtracting the required amount to shift the graph.

    If it's a vertical shift:

    • Lowering it means subtracting 2: y=(x+3)292=(x+3)211y = (x + 3)^2 - 9 - 2 = (x + 3)^2 - 11.
  4. Vertex Form of the Equation:

    • Now, y=(x+3)211y = (x + 3)^2 - 11 is in vertex form.
    • Vertex: (3,11)(-3, -11)
    • Axis of Symmetry: x=3x = -3

Let me know if you would like any further details or have any questions!

Follow-up Questions:

  1. How do you identify the vertex from a parabola in vertex form?
  2. What are the steps to find the axis of symmetry of a parabola?
  3. Can you describe the effect of shifting a parabola vertically or horizontally?
  4. What would happen to the vertex if you shifted the parabola by a different amount?
  5. How can completing the square help in graphing quadratic functions?

Tip:

Completing the square is a powerful technique for converting standard quadratic equations into vertex form, making it easier to identify key features like the vertex and axis of symmetry.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Vertex Form
Completing the Square

Formulas

y = ax^2 + bx + c
y = a(x - h)^2 + k
Completing the Square: (x + b/2)^2 - (b/2)^2

Theorems

The Quadratic Formula
Axis of Symmetry Formula: x = -b/2a

Suitable Grade Level

Grades 8-10