|[a^(2)+2a,2a+1,1],[2a+1,a+2,1],[3,3,1]|=?

Let x<1, then value of |[x^2+2, 2x+1 ,1],[ 2x+1,x+2, 1],[ 3, 3 ,1]| is a. non-negative b. non-positive c. negative d. positive

Let x<1, then value of |[x^2+2, 2x+1 ,1],[ 2x+1,x+2, 1],[ 3, 3 ,1]| is a. non-negative b. non-positive c. negative d. positive

Let x<1, then value of [[x^2+2, 2x+1 ,1],[ 2x+1,x+2, 1],[ 3, 3 ,1]] is a. none-negative b. none-positive c. negative d. positive

Let x<1, then value of [[x^2+2, 2x+1 ,1],[ 2x+1,x+2, 1],[ 3, 3 ,1]] is a. none-negative b. none-positive c. negative d. positive

Let x lt 1 , then value of |(x^(2)+2,2x+1,1),(2x+1,x+2,1),(3,3,1)| is a)Non-negative b)Non-positive c)Negative d)Positive

Let x<1, then value of |(x^2+2, 2x+1,1), (2x+1, x+2, 1), (3, 3 ,1)| is a. none-negative b. none-positive c. negative d. positive

If A=[[0 ,1 ,3],[ 1, 2,x],[2, 3, 1]] and A^(-1)=[[1//2,-4 ,5//2],[-1//2, 3,-3//2],[ 1//2,y,1//2]] ,find x ,\ y .

A=[[1,2,3],[3,-2,1],[4,2,1]] A^-1