Rate Law Expression for Bimolecular Reactions

In a chemical reaction where the concentration of reactants decreases over time, we can observe how quickly the reaction occurs. The rate of a reaction is defined as the change in concentration of reactants or products per unit time. When determining the rate of reaction, it's essential to understand the impact of various factors such as concentration, temperature, and the presence of catalysts. In this scenario, consider the following general reaction: A + B → C. If the rate of reaction is directly proportional to the concentration of both reactants A and B, how would you express the rate of reaction mathematically?