Quiz on Finding Critical Points from Standard Form

What is the formula to find the x-value of the vertex in a quadratic equation in standard form?

• x = B / 2A

• x = -B / 2A

• x = C / 2A

• x = -A / 2B

In the first example, what is the x-value of the vertex for the equation with a=1, b=4, c=-5?

• 2

• -2

• -4

• 4

For the equation in the first example, what is the y-intercept?

• (0, -5)

• (0, 4)

• (0, 5)

• (0, -4)

In the second example, what is the x-value of the vertex for the equation with a=2, b=-12, c=3?

• -3

• -6

• 3

• 6

What is the y-intercept for the equation in the second example?

• (0, -12)

• (0, 12)

• (0, -3)

• (0, 3)