Question

the value of determinant [2/-5 4/-1] is

Answer 1

Answer:

[2 4]=A , detA or |A|= a11a22-a12a21

-5 -1. =(-1).2-4.(-5)

=-2+20

=18

Answer 2

Answer:

[2/-5 4/-1]

Explanation:

2×(-1)-4×(-5)

=-2-(-20)

=-20+20

=18