I want to add points and notes for partly correct answers. Example:
Simplify : 2x + 5y + 4xy + 5x - 2y
What checks can I do in the decision tree to give partly points for:
40%: 7x + ...y + ...xy
10%: 4xy + ..x + ..y
I tried with coeff(ans1,x,1), but I can't find the right way.
Thanks for every advice.