Closed BillFoster closed 12 years ago
I get this:
This is not a valid mathematical expression. Operation 'x' is not defined. Did you mean
x*(...)
?
That's enough, isn't it?
I do not get the message 'x' is not defined. Did you mean.....
Can you send me a screenshot?
Still only get the message
This is not a valid mathematical expression.
when I input a(b+c) instead of the expected a*(b+c)
And that's because I forgot to update the numbas installation on the server. Try now.
OK - better message.
Expressions in answers such as x(x+1) are not allowed whereas x*(x+1) is for valid reasons. However, the error message only says "Not a valid mathematical expression" and this could be the case of much confusion as to the untutored eye x(x+1) looks very mathematical! The error message needs to be more specific in this case.