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
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