Question

|2 3 4|
3 4 5. = 0
4 5 6

proof without expanding (determinant)​

Answer 1

Step-by-step explanation:

2(4*6-5*5)-3(3*6-4*5)+4(3*5-4*4)

2(24-25)-3(18-20)+4(15-16)

2(-1)-3(-2)+4(-1)

-2+6-4=0