Use the quadratic equation y = x^2 – 6x + 9.




Where does the vertex of the parabola lie?


A.below the x-axis


B.on the x-axis


C.on the y-axis


D.above the x-axis


Calculate the discriminant to determine the number of real roots.

y = x^2 + 3x + 9


How many real roots does the equation have?


A.one real root


B.no real roots


C.two real roots


D.no solution to the equation