Hi Aditya,
The error(Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To perform elementwise matrix powers, use '.^'.) is regarding the expression(x^2 - 11*x + 30)
To understand the difference between x.^2 and x^2, let's create a square matrix x
x=[1,2;3,4]
ElementWiseSquare=x.^2 % Every element in the matrix is raised to power "2"
MatrixMultiplication=x^2 % For matrix multiplication, the number of columns in the first matrix must be equal to the number of rows in the second matrix
let's create a row matrix x
x=[1,2]
ElementWiseSquare=x.^2 % Every element in the matrix is raised to power "2"
MatrixMultiplication=x^2 % This statement gives an error because columns in [1,2](first matrix) not equal to rows in [1,2](second matrix)
There can be two fixes for the issue:
1) replace the x^2 in the expression(x^2 - 11*x + 30) with x.^2
2) or make sure x is a square matrix.
