How do you find the determinant of a 3×3 matrix?

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3 replies · 2K views

cleopatra

Homework Statement

A=(1,2,3; 3,2,3; 5,4,1) (A is a matrix)

How do you find |A| ?? (It´s supposed to be one number)

I´ve tried everything ...

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lanedance

Homework Helper

you're trying to find the determinant...

what have you tried

cleopatra

please just help me i´m so tired :(

cleopatra

nevermind i got it