I have just tried to solve this problem and just wondering if I am right! 1) Compute the determinant of the matrix A -1 -1 1 x^2 y^2 z^2 0 -1 0 and find all real numbers x,y, and z such that A is not invertible. Okay so I found that the det=-z^2-x^2 So when the matrix is invertible the determinant is zero! -z^2-x^2=0 Can I say that matrix is invertible when z^2=-x^2? So my question from here is would I just list numbers that would make the det zero? And how would I find y?