Stanislav Duris

Stanislav Duris on Calculate powers of ten 8 years, 5 months ago

Gave some feedback: Needs to be tested

Stanislav Duris on Discrete and continuous data 8 years, 5 months ago

Gave some feedback: Needs to be tested

Stanislav Duris on Find bounds for distance and time spent running, given imprecise measurements 8 years, 5 months ago

Gave some feedback: Needs to be tested

Stanislav Duris on Simple interest 8 years, 5 months ago

Gave some feedback: Needs to be tested

Stanislav Duris on Dividing a polynomial with remainders, using the remainder theorem 8 years, 5 months ago

Gave some feedback: Has some problems

Stanislav Duris commented on Dividing a polynomial with remainders, using the remainder theorem 8 years, 5 months ago

You may find the code I used for this useful:

\[ \begin{align} x &=\displaystyle \frac{b}{a} \\&= \frac{\var{-k}}{\var{a}} \\&= \simplify{-({k}/{a})} \end{align}\]

Stanislav Duris commented on Dividing a polynomial with remainders, using the remainder theorem 8 years, 5 months ago

This is a short and simple straightforward question so there is not much to change.

One thing you could do to improve the advice and explain the method a bit better - describe steps of calculating "we substitute $x=\displaystyle\simplify{-({k}/{a})}$ into.." so the student doesn't get confused where the final number -b/a comes from. Maybe even display it on its own line, so it would be something like:

"....we substitute

\[ \begin{align} x &=\displaystyle \frac{b}{a} \\&= \frac{\var{-k}}{\var{a}} \\&= \simplify{-({k}/{a})} \end{align}\]

into.....".