Question

someone please help i will fan and medal :)

Evaluate the determinant of the matrix

-7 -7
-6 6

A.0
B.-14
C.84
D.-84

Answer 1

thank you.

Answer 2

oh okay thank you for explaining it!

Answer 3

yw

Answer 4

can you help me with another one?

Answer 5

which one

Answer 6

oh sorry let me add it @Austin1617

Answer 7

So did you add it yet? @kirs.tenf

Answer 8

i added a screenshot of the question

Answer 9

So what did you get for the question.

Answer 10

i dont understand it

Answer 11

So this specific matrix is trying to find out the Cofactor Matrix with A-1.

The matrix would be

|dw:1445637131233:

So then the matrix your trying to find does not exist

D.

Answer 12

oh okay thank you

Answer 13

my explanation got deleted..

Answer 14

if all the elements of a row or a column are zero,then the value of determinant is zero.
if the determinant of a matrix is zero then it has no inverse.