Formula of quadratic

Write the standard form of a quadratic polynomial with real coefficients.

Which of the following is not the graph of a quadratic polynomial?

Solve the quadratic equation 2x^2-4x+3=0 by using the general expressions for the roots of a quadratic equation.

In quadratic equation ax^(2)+bx+c=0 , if discriminant D=b^(2)-4ac , then roots of quadratic equation are:

If alpha and beta are the roots of a quadratic equation such that alpha+beta=2, alpha^4+beta^4=272 , then the quadratic equation is

The sum and product of the zeros of a quadratic polynomial are -1/2 and -3 respectively. What is the quadratic polynomial.