Answer Happy

Help please. I attached an example below. Don't do the example,just use it as reference.
Find the characteristic polynomial of the matrix, using either a cofactor expansion or the special formula for 3x3 determinants. [Note: Finding the characteristic polynomial of a 3x3 matrix is not easy to do with just row operations, because the variable λ is involved.] 034 302 4 20 The characteristic polynomial is (Type an expression using as the variable.)
Find the characteristic polynomial of the matrix, using either a cofactor expansion or the special formula for 3x3 determinants. [Note: Finding the characteristic polynomial of a 3x3 matrix is not easy to do with just row operations, because the variable is involved.] 0 14 ⠀ 103 4 30 The characteristic polynomial is -³ +262 +24. (Type an expression using λ as the variable.)