Sign up ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Could someone please explain to me what property was used in simplifying this, or how this was achieved?

enter image description here

Thank you.

share|cite|improve this question
Expand the determinant by the last row. – Davide Giraudo Jun 1 '11 at 22:23

1 Answer 1

up vote 3 down vote accepted

This property:

share|cite|improve this answer
hehe I love this place. Thanks. – omegalo Jun 1 '11 at 22:26
Aka as Laplace or cofactor expansion. – lhf Jun 1 '11 at 22:27

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.