Math tutorial for adding two rational expressions

The video tutorial covers the process of adding fractions with common denominators, emphasizing the importance of finding the least common denominator. It explains that multiplying denominators is a simple method but not always the most efficient. The tutorial highlights the use of factoring, particularly the difference of squares, to identify common denominators. It demonstrates combining fractions by applying the distributive property and concludes with a final answer, noting restrictions on variable values.

Explain the significance of factoring in finding the least common denominator.

What is the final answer when combining the fractions 3/(X - 3) and (2X + 6)/(X + 3)?