1. The property of exponents used in number two is the \textbf{Product of Powers Property}. 2. This property states that when multiplying two expressions with the same base, you add the exponents: $$a^m \times a^n = a^{m+n}$$ 3. For example, if you have $x^3 \times x^4$, you add the exponents: $$x^{3+4} = x^7$$ 4. This rule helps simplify expressions by combining powers with the same base. 5. Remember, this only works if the bases are the same. 6. This property is fundamental in algebra for simplifying and solving exponential expressions.