Composite Absolute Function
1. **Stating the problem:** We are given two functions:
- $f(x) = x^2 - 6x + 5$
- $g(x) = |f(-|x| + 1) - 2|$
We need to analyze the function $g(x)$ based on $f(x)$.
2. **Analyzing $f(x)$:**
The function $f(x)$ is a quadratic. Let's rewrite it in vertex form by completing the square:
$$f(x) = x^2 - 6x + 5 = (x^2 - 6x + 9) - 9 + 5 = (x - 3)^2 - 4$$
This tells us:
- The vertex is at $(3, -4)$.
- The parabola opens upwards.
3. **Understanding the input to $f$ in $g(x)$:**
The input to $f$ in $g(x)$ is $- |x| + 1$.
For any real $x$, $|x| \\geq 0$, so $- |x| + 1 \\leq 1$.
This means the argument to $f$ ranges from $-\\infty$ to $1$, but since $|x|$ grows without bound, effectively the domain of input to $f$ in $g$ is $(-\\infty, 1]$.
4. **Evaluating $f(-|x|+1)$:**
Substitute $u = -|x| + 1$, then
$$f(u) = (u-3)^2 - 4$$
So,
$$f(-|x| + 1) = ((- |x| + 1) - 3)^2 - 4 = (- |x| - 2)^2 - 4 = ( - |x| - 2)^2 - 4$$
5. **Simplify the squared term:**
Since $(-|x| - 2)^2 = (|x| + 2)^2 = |x|^2 + 4|x| + 4 = x^2 + 4|x| + 4$
Thus,
$$f(-|x| + 1) = x^2 + 4|x| + 4 - 4 = x^2 + 4|x|$$
6. **Form of $g(x)$:**
Recall $g(x) = |f(-|x| +1) - 2|$, so
$$g(x) = |x^2 + 4|x| - 2|$$
7. **Interpreting $g(x)$:**
The function takes the value of the quadratic-like expression with the absolute value inside and shifts it down by 2, then takes the absolute value of the result.
8. **Final expression:**
$$\boxed{g(x) = |x^2 + 4|x| - 2|}$$
This expression fully describes $g$ in terms of $x$ without nested functions.
**Summary:** We started with
$$g(x) = |f(-|x| + 1) - 2|$$
where
$$f(x) = x^2 - 6x + 5 = (x-3)^2 - 4$$
calculating and simplifying, we found
$$g(x) = |x^2 + 4|x| - 2|$$