Answer:
Step-by-step explanation:
The system of equations in vector form is
[tex]5x_1 + x_2 - 3x_3 = 0 \\72x_2 + 9x_3 = 0[/tex]
And can be written in matrix form as
[tex]\left[\begin{array}{ccc}5&1&-3\\0&72&9\\0&0&0\end{array}\right] \left[\begin{array}{c}x_1&x_2&x_3\end{array}\right] = \left[\begin{array}{c}0&0&0\end{array}\right][/tex]
With three unknowns in two equations, the system has infinitely many solutions.
