The difference of a number and four, subtracted from the sum of nine and twice a number

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Can someone me and explain..will award brainlest!

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.