7.4 Radical in the denominator - MCCC

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135 day 10 April 01, 2015 Simplifying Radicals 7.4 Radical in the denominator 1 rationalizing the denominator

Transcript of 7.4 Radical in the denominator - MCCC

Page 1: 7.4 Radical in the denominator - MCCC

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Simplifying Radicals7.4 Radical in the denominator

1

rationalizing the 

denominator

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Conjugates

                            difference of square

a+b     a­b                 a2 ­ b2

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rationalizing denominators 

(NOT square root)

Multiply top and bottom by what you need to make a rational number in the denominator

64=8 * 8= 2*2*2*2*2*2=26

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108=2   108

2     54

3     27

3       9

         3

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square root in equation 

Square both sides

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to hard to call ...hope this doesnt happen to you!

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complex Numbers

imaginary

complex  6 + 2i  

complex conjugate  6 ­ 2i

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2 ­ 3i

3 ­ 7i 3 + 7i

3 + 7i 6 + 14i ­9i ­21i2

9 ­ 49i2

6 + 5i ­ 21 (­1)

    9 ­ 49(­1)

27+5i58

27   +   5i

58        58

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i^53 = i^52 * i = i