Why do we use factoring to simplify rational expressions

The video tutorial covers simplifying fractions and polynomials. It begins with a review of simplifying the fraction 12/8 by finding the greatest common factor, resulting in 3/2. The tutorial then transitions to factoring polynomials, using the example of X^2 - 4X + 3 divided by X - 3. The instructor explains the process of factoring and simplifying expressions by identifying common factors, drawing parallels between numerical and polynomial simplification.

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