Question

how do you evaluate determinant?

Answer 1

You multiply all the numbers in the down diagonals and subtract the product of the numbers in the up diagonals.
That will probably be extremely unclear, do you have a matrix problem to solve or should I get a random one?

Answer 2

yea but idont know how to but them the numbers on top of each other

Answer 3

*put

Answer 4

For the matrix
\[\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\]
The determinant is:
a*d-b*c

Answer 5

my problem are just straight lines

Answer 6

is it the same thing

Answer 7

?

Answer 8

For matrix:
\[\left[\begin{matrix}a & b&c \\ d & e&f\\g&h&k\end{matrix}\right]\]
The determinant will be represented by straight lines instead of the matrix brackets and is calculated as:
(a*e*k+b*f*g+c*d*h) - (g*e*c+h*f*a+k*d*b)

Answer 9

Yes. If it has the brackets, that's the matrix. If it has the straight lines, that is the determinant of the matrix.

Answer 10

that's the problem

Answer 11

The solution is:
[ (-7)(6)(4)+(-2)(1)(4)+(-1)(3)(4) ] - [ (4)(6)(-1)+(4)(1)(-7)+(4)(3)(-2) ]
[ -168-8-12 ] - [ -24-28-24]
-188+76
-112

Answer 12

To make it easier to follow the operations, you can re-write the first two columns at the end and see the sequence of operations easier.