# How do you find the determinant of |(9,12), (12,16)|?

Jan 2, 2017

## 0

#### Explanation:

$| \left(9 , 12\right) , \left(12 , 16\right) |$is evaluated by the following rule;

$| \left(a , b\right) , \left(c , d\right) | = a d - b c$

$\therefore | \left(9 , 12\right) , \left(12 , 16\right) | = 9 \times 16 - 12 \times 12$

$= 144 - 144 = 0$