` |(10,0,-3),(-2,-4,1),(3,0,2)| ` ` =10|(-4,1),(0,2)|` ` -(-2)|(0,-3),(0,2)|` ` +3|(0,-3),(-4,1)|`

`= 10[(−4)(2) − (0)(1)]` ` + 2[(0)(2) − (0)(−3)]` ` + 3[(0)(1) − (-4)(-3)]`

`= 10(-8) + 2(0) + 3(−12)`

`= −80 − 36`

`= −116 `

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