Question 582463
<font color="red">False</font>. If the determinant of a square matrix is zero, then you cannot use cramers rule because cramers rule has you dividing by the determinant (and you cannot divide by zero).


So basically, the fact that you cannot use cramers rule doesn't automatically mean that A is not a square matrix. The matrix A could be square, but it could also have a determinant of zero (which means that you can't use cramers rule)