numpy.linalg.LinAlgError: Last 2 dimensions of the array must be square

Question

I am using solve() function of linear algebra module of numpy to solve the following system of equations, but I am getting error : "numpy.linalg.LinAlgError: Last 2 dimensions of the array must be square".

3x1 + 7x2 + 2x3 = 17
7x1 + x2 + 5x3 = 25

Answer 1

In your system of equations, you have three variables x1, x2, x3 whereas you have only 2 equations. Therefore, the solve() function is throwing an error.

The number of variables should be equal to the number equations. Then you will not get an error. So, you need to add one more equation.