• March 3rd 2013, 04:50 PM
nSober
M [-4 x]
[-10 -5]

Find the valueof x which would make M a non singular Matrix.

Can someone please explain to me how to do this? THanks
• March 3rd 2013, 05:17 PM
Even after you have told exactly what to do? The given matrix is $\begin{bmatrix}-4 & x \\ -10 & -5 \end{bmatrix}$. The determinant is [tex](-4)(-5)- (-10)(x)= 20+ 10x[tex]. That will be 0 when x= -2. The matrix will be non-singular for any other value of x.