Review later 8. Complete the square on the function: g() x-4x +1, so it is written in vertex form. Explain what transformations have happened to the parent %3D quadratic function whose vertex (0,0). Format Font Size BIUS X x 99 A A- V I 非 三三三三 4.

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### Completing the Square for Quadratic Functions

#### Question 8:
Complete the square on the function \( g(x) = x^2 - 4x + 1 \) so it is written in vertex form. Explain what transformations have happened to the parent quadratic function whose vertex is at \((0,0)\).

#### Solution Explanation:
1. **Starting Function:**
   \[
   g(x) = x^2 - 4x + 1
   \]

2. **Rewrite with Completing the Square:**
   - Take the coefficient of \( x \), divide it by 2, and then square it: \( (-4/2)^2 = 4 \).
   - Add and subtract this square within the function to create a perfect square trinomial:
     \[
     g(x) = x^2 - 4x + 4 - 4 + 1 = (x - 2)^2 - 3
     \]

3. **Vertex Form:**
   \[
   g(x) = (x - 2)^2 - 3
   \]

#### Transformations:
- **Horizontal Shift:** By rewriting the function as \( (x - 2) \), the graph of \( g(x) \) shifts 2 units to the right.
- **Vertical Shift:** With the \(- 3\) outside the squared term, the graph shifts 3 units downward.

Hence, the combined transformations from the parent function \((x^2)\) to the transformed function \((x - 2)^2 - 3\) are:
- Rightward shift by 2 units.
- Downward shift by 3 units.

#### Summary:
The final vertex of the quadratic function \( g(x) \) is \( (2, -3) \). The parent function \( f(x) = x^2 \), initially at vertex \((0,0)\), undergoes transformations to arrive at the new vertex position at \((2, -3)\).
Transcribed Image Text:### Completing the Square for Quadratic Functions #### Question 8: Complete the square on the function \( g(x) = x^2 - 4x + 1 \) so it is written in vertex form. Explain what transformations have happened to the parent quadratic function whose vertex is at \((0,0)\). #### Solution Explanation: 1. **Starting Function:** \[ g(x) = x^2 - 4x + 1 \] 2. **Rewrite with Completing the Square:** - Take the coefficient of \( x \), divide it by 2, and then square it: \( (-4/2)^2 = 4 \). - Add and subtract this square within the function to create a perfect square trinomial: \[ g(x) = x^2 - 4x + 4 - 4 + 1 = (x - 2)^2 - 3 \] 3. **Vertex Form:** \[ g(x) = (x - 2)^2 - 3 \] #### Transformations: - **Horizontal Shift:** By rewriting the function as \( (x - 2) \), the graph of \( g(x) \) shifts 2 units to the right. - **Vertical Shift:** With the \(- 3\) outside the squared term, the graph shifts 3 units downward. Hence, the combined transformations from the parent function \((x^2)\) to the transformed function \((x - 2)^2 - 3\) are: - Rightward shift by 2 units. - Downward shift by 3 units. #### Summary: The final vertex of the quadratic function \( g(x) \) is \( (2, -3) \). The parent function \( f(x) = x^2 \), initially at vertex \((0,0)\), undergoes transformations to arrive at the new vertex position at \((2, -3)\).
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