153k views
0 votes
Help please asap!!!!!!!

Help please asap!!!!!!!-example-1

1 Answer

3 votes

Answer:

a. -12

Explanation:

The question is about finding 3×3 matrix determinant

The general formulae for finding determinant;

when given a matrix {a b c}

{d e f} = a.x [e f] - b. x [d f] + c .x [d e]

{g h i} [h i] [g i] [g h]

where x=determinant

Substitute values

{-1 5 1 } {a b c}

{4 -2 2} ={ d e f} = -1 x{-2 2} - 5 x {4 2} + 1 x {4 -2}

{1 2 2} {g h i} {2 2} {1 2} {1 2}

=-1 {-4-4} - 5{ 8-2} + 1{ 8--2}

=-1{-8} - 5{6} + 1{10}

= 8- 30 +10

= -12

=

User Ritesh Jagga
by
8.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories