Solving Quadratic Equations by Graphing Real World

What are the zeros of the function shown?

• -6 only

• -2 and 3

• 2 only

• -3 and 2

The solutions of a quadratic equation are known as the _____.

• Vertices

• Roots

• Squares

• Formulas

• A
  Roots
  x = 2
  x = -4
• B
  Roots
  x = 2
  x = 4
• C
  Roots
  x = -2
  x = -4
• D
  Roots
  x = 0
  x = 4

• A
  1 Real Solution
• B
  2 Real Solutions
• C
  No Real Solutions
• D
  Half a Solution

Solve by graphing: x² - 9x + 20 = 0

• x = -4 and x = -5

• x = 20 and x = -9

• x = 4 and x = 5

• x = -4 and x = 5

Solve by graphing:

2x² + 17x + 21 = 0

• x= ^-21/₂ or x = -17

• x= ²/₃ or x = 16

• x=-7 or x = ^-3/₂

• x=15 or x = -³/₇

• (-3,0) and (6,0)

• (-1.5,0) and (2,0)

• (-3,0) and (3,0)

• (-.5,0) and (6,0)

Solve by graphing: x² + 3x - 18 = 0

• x = -3 and x = 6

• x = 3 and x = -6

• x = -9 and x = 2

• x = 9 and x = -2

Solve the equation by graphing.
 -x² + 12x - 36 = 0

• 6

• 3

• 4

• no solution

• (-3,0) and (6,0)

• (-1.5,0) and (2,0)

• (-3,0) and (3,0)

• (-.5,0) and (6,0)