find its determinant

[niqueboyd]

pt) Given the matrix
5 3 0
5 0 0
?3 3 ?1

(a) find its determinant;
Your answer is :
(b) does the matrix have an inverse?
Your answer is (input Yes or No) :

 

[tkhunny]

Please show your work. No one who wants you to learn wants to do your homework for you.