Bug with polynomial extension

[William Haynes]

Hi Christian,

If I define H=2, these four all give different results:

P_1 = polynomial(x,[1,1,1])

P_2 = polynomial(x,[1,2/H,4/H^2])

P_3 = polynomial(x,[1,2/H,2/H])

P_4 = polynomial(x,[2/H,2/H,2/H])

Example:  

https://numbas.mathcentre.ac.uk/question/121632/polynomial-with-variables/

or 

https://numbas.mathcentre.ac.uk/question/share/view/815a7e91-8fa7-4b2b-bfa8-cc42892d13d9

Will

[Christian Lawson-Perfect]

Ah, it didn't account for the `rational` data type. I've added a line to make sure it converts all the coefficients to the `number` type.

Thanks for reporting this!

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