Question

Determinant of 3 x 3 matrix having first row [ 1 2 5], second row [ 3 5 7] and third row [ 4 5 0] will be ________.
Select one:
a. 4
b. -4
c. 2
d. -3

Answer 1

Answer:

b).  -4

Step-by-step explanation:

so determinant of the given matric is given by

1[5*0 - 5*7] - 2[3*0 - 4*7] + 5[3*5 - 4*5}                              

=-35+56-25

=56-60

=  - 4