On Monday, November 14, 2016 at 6:39:36 PM UTC+8, asetof...@gmail.com wrote:   
   > For x^2=0   
   > The integers solutions are 2 not 1   
   > They are coincident but they are 2   
      
   By default, "solve" is from SystemSolvePackage, which is meant to   
   solve "systems of rational functions".  To solve for roots of polynomial,   
   use radicalSolve.   
    	   
   > NumberOfFactor of x^2   
   > Would be 2 not 1   
      
   The factor is "x" and the exponent of factor "x" is 2.   
   If you want "numberOfFactorExponent", you have to write a new   
   function for it.   
      
   > Why r:=1; degree(r,mainVariable(r))   
   > Not return 0?   
   > r:=x^2; degree(r,mainVariable(r))   
   > return ok 2   
   > r:=x; degree(r,mainVariable(r))   
   > return ok 1   
   > Etc   
      
   What's the type of "r"?   
      
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