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Review 5-Rational Expressions (I cannot upload due to scanner issues-will do so asap)
Introduction to simplifying rational expressions
: Sal explains what it means to simplify a rational expression and why we would want to do that. Just don't forget the excluded values!
How to simplify a rational expression by canceling binomial factors (example)
: Sal solves the following problem: Given a rectangle with length a^2+6a+27 and width a^2-9, write the ratio of the width to the length as a simplified rational expression.
How to simplify a rational expressions using advanced factorization methods (example)
: Sal simplifies and states the domain of (2x^2+13x+20)/(2x^2+17x+30).
How to divide rational expressions with polynomial numerators and denominators (example)
: Sal performs the following division and simplifies the result: (2p+6)/(p+5) ➗ (10)/(4p+20).
How to subtract rational expressions by finding the least common multiple (example)
: Sal performs the following subtraction and simplifies the result: (a-2)/(a+2) - (a-3)/(a^2+4a+4).