Variables evaluation

When defining the question's correct answer, we can expect the corresponding expression to be displayed as we have written it, or we want to evaluate it before showing the result to the students. To do so, we need to use the evaluate() command and insert the variables to be simplified as its argument.

If we don't use the command mentioned above and just type √#a2+#b2, the correct answer will be displayed, as you can see below.

It won't suppose any validation problem, as the student's answer will be compared following the corresponding assertions as usual. We only recommend using the evaluate() command to display the correct answer in a more compact way.