To simplify the expression x² + 2x, you can factor it. First, look for common factors in both terms of the expression.
In this case, both x² and 2x have a common factor of x. You can factor x out of the expression:
x² + 2x = x(x + 2)
This tells us that the expression simplifies to x times the quantity (x + 2). This factored form can be useful in various mathematical situations, such as solving equations or finding roots.