Question

9. FIND THE VALUE OF: *
[(-1)2]^-5 x 6°​

Answer 1

Step 1:

R2→R2–2R1

R3→R3-(1/2)R1

Step 2:

R2→R2÷9

R3→R3×2

Step 3:

R3→R3–9R2

Now finally you are left with 13-x in A33

As the rank is 2 the last row should have all elements as 0

13-x=0

So x=13