Evaluate the determinant for the following matrix: [- 5 1 1 4] a. –21 b. 19 c. –17 d. –24

-21

Step-by-step explanation:

I assume this is a 2 by 2 matrix.

determinant = -5 * 4  - 1 * 1 = -20 - 1 = -21

Option A.

Step-by-step explanation:

If a matrix is defined as

then its determinant is

Let the given matrix is

We need to find the determinant for the given matrix.

Using the above formula we get

The determinant of given matrix is -21. Therefore, the correct option is A.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225