Question

What is the determinant of
D= -4 3
-7 6

Answer 1

- 3

Explanation:

The determinant of a 2 × 2 matrix A =
`\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]` is

det A = ad - bc

Given

`\left[\begin{array}{ccc}-4&3\\-7&6\\\end{array}\right]` , then

det A = (- 4 × 6) - (3 × - 7) = - 24 - (- 21) = - 24 + 21 = - 3

Answer 2

-3

Explanation:

the 2nd choice is the correct answer, you just have to find the determinant of

D= -4 3

-7 6

which would be -3