Fractional Expressions Sec. P.5 Fractional Expressions
Domain Set of real numbers for which an algebraic expression is defined
Equivalent Expressions that have the same domain and yeild the same values for all numbers in their domain Ex. (x + 1) + (x + 2) = 2x + 3
Finding the domain You must decide if there is anything it cannot be. What can x not equal Look for radicals and fractions
Fractional expression Quotient of 2 algebraic expressions
Rational Expressions Quotient of 2 polynomials
In order to simplify rational expressions you must factor
Factoring completely and changing the sign of a factor may allow more reducing
When mutliplying with a rational expression simplify first
Division Same as multiplication just remember to change to multiplication and use the reciprocal of the second fraction
HW. P. 48 1-8, 11-27 odd, 35-41 odd, 61