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x cubed + 4x =1 has a solution between x = 0 and x = 1

 Mar 8, 2017
 #1
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It has 3 roots, one "real" and two "complex":

 

1 - x≈  0.24627

2 - x≈ -0.1231 -  2.0113 i

3 - x≈ -0.1231 + 2.0113 i

 Mar 8, 2017

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