The expression "3x^2" represents a mathematical term in algebra. Here, "3" is a coefficient, indicating that the variable x is multiplied by itself and then by 3. The term "x^2" signifies that x is raised to the power of 2, meaning it is squared. This expression is commonly used in quadratic equations and functions. In a graph, the expression "3x^2" describes a parabola that opens upwards. The coefficient "3" affects the width of the parabola; a larger coefficient results in a narrower shape. This concept is essential in various fields, including physics and engineering, where quadratic relationships are analyzed.