I have just tried to solve this problem and just wondering if I am right!(adsbygoogle = window.adsbygoogle || []).push({});

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?

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# Homework Help: Matrix determinant

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