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Penta-Quadratic (Posted on 2014-02-23) Difficulty: 3 of 5
Let x be a non-zero real number such that (x3+20x)1/5=(x5-20x)1/3. Find the product of all possible values of x.

No Solution Yet Submitted by Danish Ahmed Khan    
Rating: 4.0000 (1 votes)

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Question re: A long way ----=0.0024990669i ?? | Comment 3 of 5 |
(In reply to A long way by Jer)

if I err- I apologize.

My intuition objects to existence of morev than 5 solutions:

x^2 =  -4, 0,  5.

Please check whether =0.0024990669i fits the original set of equations or only some ot the interim polynomial expressions.

Btw, one cannot "compare" two complex numbers.


  Posted by Ady TZIDON on 2014-02-24 06:39:44
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