Adding complex rational expressions and simplifying the answer

The video tutorial explains how to simplify fractions by finding a common denominator, specifically focusing on complex numbers. It covers the process of determining the least common denominator (LCD), multiplying terms by the LCD, and applying the distributive property. The tutorial also discusses the difference of squares and how to express complex numbers in A+BI format. The final calculation is presented, demonstrating the steps to reach the solution.

How do you simplify the expression involving I squared in the context of complex numbers?

What is the final answer when combining the terms in the expression 12 + 9I divided by 5?