Finding Zeros of Quadratic Functions

What is the vertex of a parabola?

• The point where the graph is widest

• The highest or lowest point on the graph

• The point where the graph crosses the x-axis

• The point where the graph crosses the y-axis

What is another name for the x-intercepts of a quadratic equation?

• Peak points

• Vertex points

• Axis of symmetry

• Roots or zeros

If a quadratic cannot be factored, what method can be used to find the roots?

• Graphical method

• Division method

• Quadratic formula

• Linear equation method

What does the quadratic formula solve for in a quadratic equation?

• The y-intercept

• The x-intercepts

• The vertex

• The maximum height

What is the correct expression for the roots when solving x^2 - 76 = 0?

• x = 1/76

• x = 76^2

• x = sqrt(76) / 2

• x = ±sqrt(76)

How many roots can a quadratic equation have?

• One or two

• Zero, one, or two

• Always one

• Always two

What happens if a quadratic graph never crosses the x-axis?

• It is not a function

• It has no roots

• It has one root

• It has two roots

What is the y-intercept of the equation x^2 - 20 = 0?

• (0, 20)

• (20, 0)

• (0, -20)

• (-20, 0)

What is the approximate value of the roots for the equation x^2 - 20 = 0?

• ±4.47

• ±20.00

• ±2.00

• ±5.00

What does the 'a' value in a quadratic equation determine?

• The direction the parabola opens

• The x-intercepts

• The y-intercept

• The vertex