Without expanding determinants show that`|(1,3,6),(6,1,4),(3,7,12)|+4|(2,3,3),(2,1,2),(1,7,6)|=10|(1,2,1),(3,1,7),(3,2,6)|`

Expand the following determinants: |(1,-3,2),(4,-1,2),(3,5,2)|

Expand the following determinants: |(2,3,-5),(7,1,-2),(-3,4,1)|

Expand the following determinants: |(6,-3,2),(2,-1,2),(-10,5,2)|

The inverse of the matrix [[3, -2, -1], [-4, 1, -1], [2, 0, 1]] is a) [(1,2,3),(3,3,7),(-2,-4,-5)] b) [(1,-3,5),(7,4,6),(4,2,7)] c) [(1,2,3),(2,5,7),(-2,-4,-5)] d) [(1,-3,5),(7,4,6),(4,2,-7)]