Question

How do you find the determinant of `((3, 0, -1), (4, 6, 2), (8, -2, 3))`?

Answer 1

`det=122`

Explanation:

`D=3|(6,2),(-2,3)|-0|(4,2),(8,3)|+(-1)|(4,6),(8,-2)|`

`=3(18-(-4))-0 -1(-8-48)->`Use Cramer's Rule `|(r,s),(t,u)|=ru-st`

`=3(22)-1(-56)`

`=66+56`

`det=122`