how to calculate the unknown matrix

clear all 
close all
clc

s = -14.5 % syms s
A = [-3, 5, -7, 0; 0.5, -1.5, 0.5, -7.5; -5, 0, -3, 0; -0.5, -5, 0, -7];
B = [1, 0; 0, -1; -2, 0; 0, 1];
C = [1, 0, 0, 0; 0, -1, 0, 0];
D = [-1, 0; 2, 0];
M = (s*eye(4,4) - A);
P = [ M, -B; C, D]
k = rank(P)
d = det(P)
P*[x] = 0

I want to calculate the matrix [x]

[darova]

Here is the answer

x = [0 0 0 0 0 0 0 0]'

[Virendra Kowale]

no its not the correct answer

Answer 1

[Alan Stevens]

help null

[Virendra Kowale]

thanks a lot