Warm up 3/1/16 happy March! Write a simplified expression for the area of a rectangle. Write the restrictions. Area = base x height Answer:

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Presentation transcript:

Warm up 3/1/16 happy March! Write a simplified expression for the area of a rectangle. Write the restrictions. Area = base x height Answer:

8.5 Adding and Subtracting Rational Expressions (day 1) I <3 Los Al

Objective To add and subtract rational expressions

Prior Knowledge What is the rule when adding and subtracting fractions?

Prior Knowledge Knowing what you know about adding and subtracting fractions how do you think we are going to apply this to rational expressions?

Ex 1) Add/Subtract (4b2) (12ab) (3a2) LCD Multiply top and bottom of each fraction to create LCD Factor!!!

T.O.O. Ex 2) Ex 3) Ex 4) (5) (5) (z) (x) (x) (z) (4y) (4y)

Ex 5) Denominators must be factored to find LCD (x – 1) (x + 3) Common denom: (x + 3)(x – 2)(x – 1)

Cont…

Steps Factor Denominators Create LCD Find restrictions on LCD Multiply out Numerators Combine Like Terms in Numerators Factor Numerators (if possible) Cancel (if possible)

T.O.O Ex 6) Ex 7) LCD = 2h(h-1) LCD = (x-5)(x-1) Answers (x-5) (h)

Homework Pg. 539 #7-21 odd, 31-35 odd, 48

TOD Simplify