To factor the expression \(15x + 45\), we can find the greatest common factor (GCF) of the two terms.

1. **Identify the GCF**: The GCF of \(15\) and \(45\) is \(15\).
2. **Factor out the GCF**: 

\[
15x + 45 = 15(x + 3)
\]

Thus, the factored form of \(15x + 45\) is \(15(x + 3)\).

Would you like more details on factoring or have any questions? Here are some related questions you might consider:

1. What is the process for factoring polynomials with more terms?
2. How do you factor expressions that include variables raised to powers?
3. Can you explain the difference between factoring and expanding expressions?
4. What are some common mistakes to avoid when factoring?
5. How can factoring help in solving equations?

**Tip**: Always look for the GCF first when factoring an expression, as it simplifies the process significantly.

Learn how to factor the expression 15x + 45 by identifying the greatest common factor. This tutorial explains the process of factoring using GCF and is suitable for students in Grades 6-8. Master key algebraic skills and understand how to simplify expressions.

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