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Mathematics Algebra Equation Solving Wolfram Language

A bug or not in Equation solver?

Daqing Li

Posted 2 months ago

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In[6]:= Solve[-3 (y - 2)^(4/5) + 29 == -19, y, Integers] Out[6]= {{y -> 34}} There is another root for above equation that is y -> -30. But the software only display one root. Is it a bug?

POSTED BY: Daqing Li

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Posted 2 months ago

You can use Surd to also get the negative real root: Solve[-3 Surd[(y - 2)^4, 5] + 29 == -19, y] (* {{y -> -30}, {y -> 34}} ) As an alternative the equation can be rewritten: Solve[-3 ((y - 2)^4)^(1/5) + 29 == -19, y, Integers] ( {{y -> -30}, {y -> 34}} *)