If A=[(x,x-1),(2x,1)] and if det A = -9,...

If `A=[(x,x-1),(2x,1)]` and if det A = -9,
then the value of x are

A

`3/(2),-3`

B

`(-2)/(3),3`

C

`2/(3),3`

D

`(-3)/(2),3`

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The correct Answer is:

D

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