9.2 Adding and Subtracting Rational Expressions Algebra II w/ trig

In order to add and subtract fraction you must have a common denominator. - If you have a common denominator, simply combine like terms in the numerator. - If you DON’T have a common denominator, work carefully to create one. - Always ask yourself, “What does this denominator need that is doesn’t already have?” - Always factor factorable denominators, this will help find the LCD quicker.

I. Find the LCM (least common multiple also known as the least common denominator). A. B. C. D.

E. F.

II. Simplify(Add or Subtract) A. B.

C. D.

E.

F.

G.

H.- Simplify num/ den separately. - Then use rules for ÷

I.