8.4 Adding and Subtracting Rational Expressions Objective: Add and subtract rational expressions Standard: Present mathematical procedures and results clearly, systematically, succinctly and correctly.
C. Simplify:
D. Simplify:
The least common denominator (LCD) of two rational expressions is the least common multiple of the denominators. The least common multiple (LCM) of the two polynomials is the polynomial of the lowest degree that is divisible by each polynomial.
Example 2
Simplify: LCD: (x+5)(x-5)
Example 3
LCD is 3(x-1)(x+1) Simplify:
LCD is 9
LCD is (x-5)(x+3)