Asked by Jenny
Find the variable for the following 3x3 matrix.
|x 3 -1
2 1 -2
4 1 x|
Note: This entire matrix =10
|x 3 -1
2 1 -2
4 1 x|
Note: This entire matrix =10
Answers
Answered by
Jenny
I need help with this ASAP. Thanks so much!
Answered by
Reiny
Did you mean the determinant of the matrix is 10 ?
Answered by
Jenny
Yes.
Answered by
Reiny
I don't know what method you have learned to find the determinant, but I get
x^2 - 4x - 22 = 10
x^2 - 4x - 32 = 0
(x-8)(x+4) = 0
x=8 or x=-4
x^2 - 4x - 22 = 10
x^2 - 4x - 32 = 0
(x-8)(x+4) = 0
x=8 or x=-4
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.