5489/48647348

0.000112832461083 is the answer

is it correct?

or is it not correct?

could it be basic math

Can I ask you question? okay so the question is  this is a basic test question for you $\mathbf{M} \begin{pmatrix} -3 & 4 & 0 \\ 5 & -7 & 0 \\ 0 & 0 & 1 \end{pmatrix} = \mathbf{I}.$

I think it good 

                      -Thanks