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Elliott Fletcher 2 years, 1 month ago
Published this.Christian LawsonPerfect 2 years, 2 months ago
Gave some feedback: Ready to use
Elliott Fletcher 2 years, 2 months ago
Thanks for your feedback Brad,
I did try to make it so that s and t were always integers but i think there are so many numbers involved in the calculation that it would be very difficult to do. Instead i have restricted the values that the variables can take to make the fractions in the answers slightly nicer.
I see what you mean about the error message, i'm not sure how to fix this but i have said that you can leave your answer as a fraction in the question.
I have also split the question up into parts to make it more accessible to students with less algebraic skill.
Elliott Fletcher 2 years, 2 months ago
Gave some feedback: Needs to be tested
Bradley Bush 2 years, 2 months ago
Gave some feedback: Has some problems
Bradley Bush 2 years, 2 months ago
Amazing question, most of my feedback revolves around the idea that I think it might be too hard for the student so I only have a few comments on this one:
 I didn't find an example of when s and t weren't both fractions, I think this adds to the complexity and the challenge of the question but is this what we want to be testing? Could this be imporved through making the variables 'nicer' so the answers are whole numbers more often than not?
 If you are leaving the answers as their more complex fraction form then you need to have a go at changing the error message that comes up. The answer gap still accepts a fractional answer if you type the fraction in full, however, if you're slow like me and you type "x/" and then pause for a second, you'll get an error message "your answer is invalid. You must enter an integer or a decimal. This is weird because when you then finish the expresion, the error message goes away. I am just thinking that this might be misdirective to see for anyone typing in their answer slowly. If you can't fix the error message, and you are keeping the fractional answers then it might be worth specifying that answers can be left as fractions in the question.
 On that note, I might write "reduce your answer to simplist [fractional] form" instead of "reduce your answer to it's lowest terms"; or something along those lines.
 I am actually thinking that the question still might be too hard for some students, making it inaccessible to the students who have less algebraic skill; even with the changes I suggested above. Maybe a solution of this is to create a copy of the question (labelling it 'easy version') and have the same question, just break it down into parts by asking students to give an expression for p(factor 1) then p(factor 2) then with the third part asking them to use simultaneous equations to find t and s.
 Your parts and advice seem free of typos and formatting errors (I'm very jealous).
Feel free to ask if you don't understand any of what I've been getting at. High quality question.
Elliott Fletcher 2 years, 2 months ago
Gave some feedback: Needs to be tested
Elliott Fletcher 2 years, 2 months ago
Created this.Name  Status  Author  Last Modified  

Finding unknown coefficients of a polynomial, using the remainder theorem  Ready to use  Elliott Fletcher  20/05/2019 13:28  
George's copy of Finding unknown coefficients of a polynomial, using the remainder theorem  draft  George Loughlin  06/07/2017 15:09  
Encontrar coeficientes desconocidos de un polinomio, usando el teorema del resto  Ready to use  Luis Hernandez  15/01/2019 03:38  
Simon's copy of Finding unknown coefficients of a polynomial, using the remainder theorem  draft  Simon Thomas  28/02/2019 12:15  
Finding unknown coefficients of a polynomial, using the remainder theorem  draft  Johnny Yi  30/04/2019 03:19  
Christian's copy of Finding unknown coefficients of a polynomial, using the remainder theorem  draft  Christian LawsonPerfect  20/05/2019 13:55  
Finding unknown coefficients of a polynomial, using the remainder theorem  draft  Xiaodan Leng  10/07/2019 21:44 
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This question is used in the following exams:
 Algebra and functions by Elliott Fletcher in Elliott's workspace.
 Malcolm's copy of Algebra and functions by Malcolm Roberts in Malcolm's workspace.
 Apply the factor and remainder theorems by Christian LawsonPerfect in Transition to university.
 Ryan's copy of Algebra and functions by Ryan Poling in Ryan's workspace.
 Polynomials by Max S in Max's workspace.
 Possible applicable questions from previous year by Tom Bold in Transition to university maths.