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( x^2+5)(3+x^4 )( 100x^2−10)( 100x^2+10)=0 when x=?

 Sep 30, 2015
edited by Guest  Sep 30, 2015
 #1
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( x^2+5)(3+x^4 )( 100x^2−10)( 100x^2+10)=0

 

Believe it, or not.....this has  only two "real" solutions....and they come from this part of the equation:

 

100x^2 - 10   = 0      divide through by 10

 

10x^2  - 1  = 0        add1 to each side

 

10x^2  - 1     divide both sides by 10

 

x^2  = 1/10      take the pos/neg roots

 

x = (pos/neg)[1/sqrt(10)]

 

 

 

cool cool cool

 Sep 30, 2015
edited by CPhill  Sep 30, 2015

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