Question

If a = {8 -6 2 is a singular matrix the value
-6 7 -4
2 -4 x}

Answer 1

Answer:

x= 3

Step-by-step explanation:

since A is a singular matrix

|A| = 0

therefore, on expanding along R1

8( 7x-16) +6(-6x+8)+2(24-14) = 0

56x-128-36x+48+48-28=0

20x- 128+68=0

20x= 60

x= 3

hence, x= 3