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[tex]\[
\begin{array}{l}
f(x) = x^2 - 8x + 15 \\
g(x) = x - 3 \\
h(x) = \frac{f(x)}{g(x)}
\end{array}
\][/tex]

[tex]\[
h(x) = \boxed{\phantom{}} \\
\][/tex]

The domain of [tex]\( h(x) \)[/tex] is [tex]\(\boxed{\phantom{}} \cup \boxed{\phantom{}} \)[/tex].


Sagot :

To solve the given problem step-by-step:

1. Define the Polynomials:
Given [tex]\( f(x) = x^2 - 8x + 15 \)[/tex] and [tex]\( g(x) = x - 3 \)[/tex].

2. Perform the Division:
We need to divide [tex]\( f(x) \)[/tex] by [tex]\( g(x) \)[/tex].

[tex]\[ \frac{f(x)}{g(x)} = \frac{x^2 - 8x + 15}{x - 3} \][/tex]

3. Simplification:
Factorize [tex]\( f(x) \)[/tex] if possible.

[tex]\[ f(x) = x^2 - 8x + 15 = (x - 3)(x - 5) \][/tex]

So,

[tex]\[ \frac{(x - 3)(x - 5)}{x - 3} \][/tex]

Here, [tex]\( x \neq 3 \)[/tex] to avoid division by zero. Thus,

[tex]\[ h(x) = x - 5 \quad \text{for} \quad x \neq 3 \][/tex]

4. Find the Domain:
[tex]\( h(x) \)[/tex] is [tex]\( x - 5 \)[/tex] but it is undefined at [tex]\( x = 3 \)[/tex] (because [tex]\( g(x) = 0 \)[/tex] at [tex]\( x = 3 \)[/tex]). Therefore, the domain of [tex]\( h(x) \)[/tex] excludes [tex]\( x = 3 \)[/tex].

The final answers are:
- [tex]\( h(x) = x - 5 \)[/tex]
- The domain of [tex]\( h(x) \)[/tex] is [tex]\((-\infty, 3) \cup (3, \infty)\)[/tex]

Thus, the correctly completed statements are:
- [tex]\( h(x)= \textbf{x - 5} \)[/tex]
- The domain of [tex]\( h(x) \)[/tex] is [tex]\(\textbf{(-\infty, 3)}\)[/tex] U [tex]\(\textbf{(3, \infty)}\)[/tex]