Given the polynomial

Let us look a the meaning of degrees of polynomia
The degree of a polynomial is the largest exponent on one of its variables (for a single variable), or the largest sum of exponents on variables in a single term (for multiple variables)
The highest exponent of the equation is 2,
Hence, The polynomia is of degree 2
Leading coeffiecient:
In mathematics, the leading coefficient of a polynomial is the coefficient of the term with the highest degree of the polynomial.
In the question, The coofefficent of x^2 is 1
Hence, 1 is the leading coefficient of the polumi