How to Simplify the Expression x^2 + 3x?

To simplify the expression x² + 3x, we can factor it. Both terms in the expression share a common factor of x.

Here are the steps to simplify:

1. Identify the common factor: In this case, both terms (x²) and (3x) have x as a common factor.
2. Factor out the common term: Write the expression as x(x + 3).

So, the simplified form of the expression x² + 3x is x(x + 3).