Quadratic equations

Which of the following statements is false. (read all carefully)

• The solution to a quadratic equation are the x-intercepts.

• The zeros of a quadratic equation is the same as the solution of the quadratic equation.

• A quadratic equation does not have a solution if the graph does not cross the x-axis.

• A quadratic equation has only 1 solution if the graph touches the x-axis in just one point.

• A solution to a quadratic equation includes where the graph crosses the y-axis.

The graph of a quadratic function is called a

• Parabola
• Vertex
• Axis of Symmetry 
• Vertex Form

Tags

CCSS.HSF-IF.C.7A

What are the green dots called?

• axis of symmetry

• vertex

• parabola

• roots, x-intercepts, zeros or solutions

What are the x- intercepts?

• x= 0 and x= -4
• x= 0 and x= 4
• y= 0
• x= 2

Tags

CCSS.HSF-IF.C.7A

What are the zeros of this graph?

• x = {-4, 2}

• (-4, 0 ) and (2, 0)

• x = {-1, 0}

• (-1, 9 ) and (0, -8)

Tags

CCSS.HSF-IF.C.7A

Does this graph have any roots?

• yes

• no

• I am not sure.

Tags

CCSS.HSF-IF.C.7A

Select the solutions to the equation

2x² - 3x - 2 = 0

• x = 2

• x = -0.5

• x = - 3

• x = - 2

Select the zeros of the equation

2x² - 13x + 15 = 0

• x = 1.5

• x = 5

• x = - 6

• x = 2

Select the roots to the equation

4x² + 11x + 7 = 0

• x = - 1.75

• x = 6

• x = - 1

• x = 1

Select the solutions to the equation

x² - 2x - 1 = 1

• x = -0.4

• x = 2.4

• x = -0.7

• x = 2.7