Question

Algebra 2!

Answer 1

If the determinant is not zero then the matrix has an inverse

Answer 2

but why? ;)

Answer 3

because to find the inverse you can use the determinant to find the inverse matrix but if its zero then everything equals to zero or should I say undefine

Answer 4

You have to multiply the diagonals of the matrix and subtract them from each other to see if its zero

Answer 5

i wonder, an inverse can more easily be found with an augment to I. does a det=0 confound that as well? or does it just not panout ....