x₁a+x₂b+x₃c+x₄d=0

y₁a+y₂b+y₃c+y₄d=0

z₁a+z₂b+z₃c+z₄d=0

t₁a+t₂b+t₃c+t₄d=0

how this equations change to matrix? like:

Matrix(4, 4, [x₁, x₂, x₃, x₄, y₁, y₂, y₃,y₄, z_1,z₂,z₃,z₄,t₁,t₂,t₃,t₄]).Matrix(4, 1, [a,b,c,d])=Matrix(4 ,1, [0,0,0,0])

k^4-k^2*(4*u*m+2*q^2)+k*(8*m*E*q)+4*m^2*(D^2-e^2+(q^2/2*m-u)^2)=0