Finding Roots of a Quadratic

• x = 1 and -3

• x = -1 and -3

• x = -1 and 3

• x = 1 and 3

• x = -1 and -3

• x = 1 and 3

• x = 1 and -3

• x = -1 and 3

Solve
x² + 9x + 20 = 0

• x = -2, x = -10

• x = -3, x = -4

• x = -4, x = -5

• x = -4, x = -6

Solve
x² + 7x + 12 = 0

• x = -2, x = -10

• x = -3, x = -4

• x = -4, x = -5

• x = -4, x = -6

What are the green dots called?

• axis of symmetry

• vertex

• parabola

• roots or x-intercepts

What are the roots of this function?

• x=-1, x=-4

• x=4, x=4

• x= 3, x=-2.5

• x=1, x=5

Use the graph to determine the solutions.

• -1 and -3

• 1 and -3

• 1 and 3

• -1 and 3

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

What are the solutions?

• -2, 1

• 1, 2

• -1,2

• 0,-4

What are the zeros of the quadratic function?
y = x² - 2x - 15

• x = -2
  x = -15

• x = -3
  x = 5

• x = 3
  x = -5

• x = 1
  x = -16