remove invalid solutions

[smichr]

References to other Issues or PRs

fix #25711

Brief description of what is fixed or changed

When dividing to obtain a solution in solveset, the denominator cannot be zero. This is now added as a condition when found.

No value of symbol that sets a denominator to 0 can be included in a solution.

Other comments

Release Notes

• solvers
  • solveset solutions omit invalid solution and add conditions for multiplicative factors of the independent variable

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• solvers
  • solveset solutions omit invalid solution and add conditions for multiplicative factors of the independent variable (#25713 by @smichr)

This will be added to https://github.com/sympy/sympy/wiki/Release-Notes-for-1.14.

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#### References to other Issues or PRs
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fix #25711

#### Brief description of what is fixed or changed

When dividing to obtain a solution in solveset, the denominator cannot be zero. This is now added as a condition when found.

No value of symbol that sets a denominator to 0 can be included in a solution.

#### Other comments


#### Release Notes

<!-- Write the release notes for this release below between the BEGIN and END
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* solvers
  * Added a new solver for logarithmic equations.

* functions
  * Fixed a bug with log of integers. Formerly, `log(-x)` incorrectly gave `-log(x)`.

* physics.units
  * Corrected a semantical error in the conversion between volt and statvolt which
    reported the volt as being larger than the statvolt.

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<!-- BEGIN RELEASE NOTES -->
* solvers
    * `solveset` solutions omit invalid solution and add conditions for multiplicative factors of the independent variable
<!-- END RELEASE NOTES -->