Math input when answer contain parentheses

Questions
1

Hey! We want the correct answer to be 2(7) but this answer contains parentheses and messes with the code. How do we set this to be the correct answer?

2

If you know numbers than create variables

b=7``` and write it as latex:
```${a}\left(${b}\right)```
This should do what you want
3

Where is the 2 in that latex? I see that b=7 but we are teaching that 2(7) is 2 times 7. I could just be missing the point, but can you clarify?

4

I’m guessing you may have used quotation marks. If you change to backticks, that should work better.
Computation is a more stable way of checking, though can be more complex:

check=this.numericValue=14 and countNumberUsage(this.latex,2)=1
and countNumberUsage(this.latex,7)=1
correct: check

The above would check that it evaluates to 14, that there is one 2, and that there is one 7. Note that other acceptable answers would be 7(2), 7*2, and 2*7, so if you specifically want parentheses, latex matching may be the way to go.

1 Like
5

it should be a=2 and b=7.
Then you can play with variables as you like.
{a}\left({b}\right)

if you use just ( and ) then they will not size with your expression.

6

I am trying to have students work backwards to describe a function notation. I want them to input f(a) into a table in cell (2,1). I have tried following the suggestions on this thread but it doesn’t seem to work for my table. Here is my code I am trying to fix (first row is OK) and here is my activity (slide 33) https://teacher.desmos.com/activitybuilder/custom/6399a42083cd23d3fb4e503e

cellContent(1,3):

when this.cellContent(1,2)=“-3t+5” or this.cellContent(1,2)=“5-3t” or this.cellContent(1,2)=" -3t+5"and btn5.timeSincePress()>0 “:white_check_mark:”
when btn5.timeSincePress()>0 “:x:”
otherwise “”

cellContent(2,3):

when this.cellContent(2,1)=“{f}\left({a}\right)” and btn5.timeSincePress()>0 “:white_check_mark:”
when btn5.timeSincePress()>0 “:x:”
otherwise “”

7

There’s no slide 33. I don’t think you’ve published your draft.