Chapter 8 Section 4.

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Presentation transcript:

Chapter 8 Section 4

Adding and Subtracting Radical Expressions 8.4 Adding and Subtracting Radical Expressions Simplify radical expressions involving addition and subtraction.

Simplify radical expressions involving addition and subtraction. Objective 1 Simplify radical expressions involving addition and subtraction. Slide 8.4- 3

Simplify radical expressions involving addition and subtraction. Only radical expressions with the same index and the same radicand may be combined. Expressions such as or cannot be simplified by combining terms. Slide 8.4- 4

Adding and Subtracting Radicals CLASSROOM EXAMPLE 1 Adding and Subtracting Radicals Add or subtract to simplify each radical expression. Solution: Slide 8.4- 5

Adding and Subtracting Radicals (cont’d) CLASSROOM EXAMPLE 1 Adding and Subtracting Radicals (cont’d) Add or subtract to simplify each radical expression. Solution: This expression can not be simplified any further. Slide 8.4- 6

Simplify radical expressions involving addition and subtraction. Do not confuse the product rule with combining like terms. The root of a sum does not equal the sum of the roots. For example since Slide 8.4- 7

CLASSROOM EXAMPLE 2 Adding and Subtracting Radicals with Higher Indexes Add or subtract to simplify the radical expression. Assume that all variables represent positive real numbers. Solution: Slide 8.4- 8

CLASSROOM EXAMPLE 2 Adding and Subtracting Radicals with Higher Indexes (cont’d) Add or subtract to simplify the radical expression. Assume that all variables represent positive real numbers. Solution: Slide 8.4- 9

CLASSROOM EXAMPLE 2 Adding and Subtracting Radicals with Higher Indexes (cont’d) Add or subtract to simplify the radical expression. Assume that all variables represent positive real numbers. Solution: Slide 8.4- 10

Adding and Subtracting Radicals with Fractions CLASSROOM EXAMPLE 3 Adding and Subtracting Radicals with Fractions Perform the indicated operations. Assume that all variables represent positive real numbers. Solution: Slide 8.4- 11

CLASSROOM EXAMPLE 3 Adding and Subtracting Radicals with Fractions (cont’d) Perform the indicated operations. Assume that all variables represent positive real numbers. Solution: Slide 8.4- 12

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