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Copyright © 2010 Pearson Education, Inc. All rights reserved
Sec 9.5 - 1
Copyright © 2010 Pearson Education, Inc. All rights reserved
Sec 9.5 - 2
Roots, Radicals, and Root Functions
Chapter 9
Copyright © 2010 Pearson Education, Inc. All rights reserved
Sec 9.5 - 3
9.5
Multiplying and Dividing
Radical Expressions
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 4
9.5 Multiplying and Dividing Radical Expressions
Objectives
1. Multiply radical expressions.
2. Rationalize denominators with one radical
term.
3. Rationalize denominators with binomials
involving radicals.
4. Write radical quotients in lowest terms.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 5
9.5 Multiplying and Dividing Radical Expressions
Multiply Radical Expressions
Multiplication of expressions that contain radicals is very
similar to multiplication of polynomials.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 6
9.5 Multiplying and Dividing Radical Expressions
Multiply Radical Expressions
Multiplication of expressions that contain radicals is very
similar to multiplication of polynomials.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 7
9.5 Multiplying and Dividing Radical Expressions
Multiply Radical Expressions
Multiplication of expressions that contain radicals is very
similar to multiplication of polynomials.
FOIL Method
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 8
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with One Radical Term
A simplified radical expression has no radical in the denominator.
The process of removing a radical from the denominator of a
fractional expression is called rationalizing the denominator.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 9
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with Square Roots
Rationalize the following:
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 10
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with Cube Roots
To rationalize a denominator with a cube root, we must
multiply the numerator and denominator by a number that will
result in a perfect cube.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 11
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with Binomials Involving Radicals
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 12
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with Binomials Involving Radicals
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 13
9.5 Multiplying and Dividing Radical Expressions
Rationalize Denominators with Binomials Involving Radicals
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 14
9.5 Multiplying and Dividing Radical Expressions
Writing Radical Quotients in Lowest Terms
CAUTION
Be careful to factor
before writing a
quotient in lowest
terms.
Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 15
9.5 Multiplying and Dividing Radical Expressions
Writing Radical Quotients in Lowest Terms
CAUTION
Be careful to factor
before writing a
quotient in lowest
terms.

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Operations on Radicals.ppt

  • 1. Copyright © 2010 Pearson Education, Inc. All rights reserved Sec 9.5 - 1
  • 2. Copyright © 2010 Pearson Education, Inc. All rights reserved Sec 9.5 - 2 Roots, Radicals, and Root Functions Chapter 9
  • 3. Copyright © 2010 Pearson Education, Inc. All rights reserved Sec 9.5 - 3 9.5 Multiplying and Dividing Radical Expressions
  • 4. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 4 9.5 Multiplying and Dividing Radical Expressions Objectives 1. Multiply radical expressions. 2. Rationalize denominators with one radical term. 3. Rationalize denominators with binomials involving radicals. 4. Write radical quotients in lowest terms.
  • 5. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 5 9.5 Multiplying and Dividing Radical Expressions Multiply Radical Expressions Multiplication of expressions that contain radicals is very similar to multiplication of polynomials.
  • 6. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 6 9.5 Multiplying and Dividing Radical Expressions Multiply Radical Expressions Multiplication of expressions that contain radicals is very similar to multiplication of polynomials.
  • 7. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 7 9.5 Multiplying and Dividing Radical Expressions Multiply Radical Expressions Multiplication of expressions that contain radicals is very similar to multiplication of polynomials. FOIL Method
  • 8. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 8 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with One Radical Term A simplified radical expression has no radical in the denominator. The process of removing a radical from the denominator of a fractional expression is called rationalizing the denominator.
  • 9. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 9 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with Square Roots Rationalize the following:
  • 10. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 10 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with Cube Roots To rationalize a denominator with a cube root, we must multiply the numerator and denominator by a number that will result in a perfect cube.
  • 11. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 11 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with Binomials Involving Radicals
  • 12. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 12 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with Binomials Involving Radicals
  • 13. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 13 9.5 Multiplying and Dividing Radical Expressions Rationalize Denominators with Binomials Involving Radicals
  • 14. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 14 9.5 Multiplying and Dividing Radical Expressions Writing Radical Quotients in Lowest Terms CAUTION Be careful to factor before writing a quotient in lowest terms.
  • 15. Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 9.5 - 15 9.5 Multiplying and Dividing Radical Expressions Writing Radical Quotients in Lowest Terms CAUTION Be careful to factor before writing a quotient in lowest terms.