adding and subtracting rational expressions

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Presentation Description

Demonstrates how to add and subtract rational expressions.

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Adding and Subtracting Rational Expressions:

Adding and Subtracting Rational Expressions Lesson 9.5

Warm-up:

3/10/2011 Free template from www.brainybetty.com 2 Warm-up Add: Find the least common multiple of 20 and 45 Add: Simplify:

Add & Subtract with Like Denominators:

Add & Subtract with Like Denominators 3/10/2011 Free template from www.brainybetty.com 3

Find the LCD of Rational Expressions:

Find the LCD of Rational Expressions 3/10/2011 Free template from www.brainybetty.com 4 Since 9x 2 has everything + more that 3x has, 9x 2 is the LCD. Since x 2 – 9 has everything + more that x - 3 has, x 2 – 9 is the LCD. Since the denominators have nothing in common the LCD is (2x + 3)(x+1)

Add with unlike denominators:

Add with unlike denominators 3/10/2011 Free template from www.brainybetty.com 5

Subtract with unlike denominators:

Subtract with unlike denominators 3/10/2011 Free template from www.brainybetty.com 6

Assignment:

Assignment 3/10/2011 Free template from www.brainybetty.com 7 pp. 497-499 10-14 even 28-42 even 50-70 even