The expression "ab + ac" is a mathematical representation that involves two terms: ab and ac. Here, "a" is a common factor in both terms, while "b" and "c" are different variables. This expression can be simplified by factoring out the common term "a," resulting in the expression "a(b + c)." Factoring is a useful technique in algebra that helps simplify expressions and solve equations more easily. By recognizing common factors, such as "a" in this case, we can rewrite the expression in a more manageable form, making it easier to work with in various mathematical contexts.