## WeBWorK Problems

### Re: How to in Matrix context leave un evaluated expressions

by Alex Jordan -
Number of replies: 0
This works for me in WW 2.14. But I had to use a Formula MathObject, not a Matrix. Depending on what else you are doing with $U, that may not be good. EDIT: Now I see your more recent post. You are using things like the transpose method, which I will assume do not work on a Formula. But you could get around this by doing like:$UforDisplay = Formula(...);
$U = Matrix("$UforDisplay");

and use them separately.

DOCUMENT();

$U = Formula("[ [sqrt(2),sqrt(2)], [-sqrt(2),sqrt(2)] ]"); BEGIN_PGML [[$U]]