Check whether the following is quadratic equation or not.
Here it has been given that,
Now, solving the above equation further we get,
Now as we can see, the above equation clearly does not represent a quadratic equation of the form ax2 + bx + c = 0, because x4 - 3x3 - 2x2 - x + 1 is a polynomial having a degree of 4 which is never present in a quadratic polynomial.
Hence, the above equation is not a quadratic equation.