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5.2 Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015 5.2 MULTIPLYING AND DIVIDING RADICAL EXPRESSIONS Multiplying and Dividing Radicals' Rules 1. Simplify the radical before multiplication. 2. The radicals must have the same index. 3. Multiply/Divide the coefficients, then multiply/divide the radicands (Underneath the root).
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Sep 11, 2020

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Page 1: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

5.2 ­ 

MULTIPLYINGAND DIVIDING RADICAL EXPRESSIONS

Multiplying and Dividing Radicals' Rules

1. Simplify the radical before multiplication.

2. The radicals must have the same index.

3. Multiply/Divide the coefficients, then multiply/divide the radicands (Underneath the root).

Page 2: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

To Multiply:

where: m, n, a, b  are real numbers

Example 1: Simplify the expression

Page 3: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

To Divide:

where: m, n, a, b  are real numbers

Page 4: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

RATIONALIZING DENOMINATORS

Rationalizing ­ The process when there is a radical in the denominator, both the numerator and denominator must be multiplied by an expression that will produce a rational denominator.

(ie.  Multiply the top and bottom of a fraction to eliminate the radical on the bottom)

Example 2:  Simplify and Rationalize the following expressions.

Page 5: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

c) d) 2√56√40

If the denominator is a binomial (2 terms), we must rationalize using it's CONJUGATE.

Conjugates ­  2 binomial factors whose product is the difference of 2 squares.

Page 6: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

Suppose a and b are radicals:

e)

Page 7: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

f)

g)

Page 8: Multiplying and Dividing Radicals' - Math with Mr. K.killornmath.weebly.com/uploads/3/0/9/5/30958945/5.2_-_mu... · 2019. 10. 4. · 5.2 Mulitplying and Dividing Radicals(Solutions).notebook

5.2 ­ Mulitplying and Dividing Radicals(Solutions).notebook October 19, 2015

h)

Multiply and Dividing Worksheets

p. 291 ­ #17