The sum of the values of x so that the matrix
`({:(2,2,1),(1,3,1),(1,2,2):})` -x `({:(1,0,0),(0,1,0),(0,0,1):})` is singular, is

Answer

`M_11 =1,M_12 =0,M_13 =0,M_21 =0,M_22 =1,M_23=0,M_33 =0,M_32 =0,m_33=1.A_11=1,A_12=0,A_13=0,A_21=0,A_22 =1,A_23 =0,A_33 =0,A_32=0,A_33=1 `
` M_11=11,M_12 =6,M_13 =3,M_21=-4,M_22=2,M_23 =1,M_31 =-20M_32 =-13,M_33=5,A_11 ,A_12 =-6,A_13=3,A_21=4,A_22=2,A_23=-1,A_31=20,A_32=13,A_33=5`