$$[[1, 3], [7, 1]][[-2, 6], [-9, 3]]=$$

Find the determinant of matrix A:

$$A=[[2, 6, -3],[4, 11, 3], [-2, 5, 0]] $$

Consider the following $$2times2$$ matrix A:

$$A=[[5, -1], [2, K]]$$

The value of K for which A has no inverse is most nearly: