Quadratic Solutions by Graphing

When looking at the graph of a quadratic, what should we be looking for to determine solutions?

• y-intercept

• vertex

• x-intercepts

• all of the points

What are the x- intercepts?

• x= 0 and x= -4

• x= 0 and x= 4

• y= 0

• x= 2

Use the graph to determine the solutions.

• -1 and -3

• 1 and -3

• 1 and 3

• -1 and 3

Use the graph to determine the solutions.

• x=1 and x=5

• x=-1 and x=-5

• x=-1 and x=5

• x=0 and x=5

Use the graph to determine the solutions.

• x=0 and x=2

• x=0

• x=2

• x=-2

Use the graph to determine the solutions.

• x= -3 and x= 1

• x= 3 and x= -1

• x= 3 and x= 1

• x= -3 and x= -1

Use the graph to determine the solutions.

• x= -3 and x= 3

• x= -3 and x= -1

• x= -3 and x= 1

• x= 3 and x=-1

Use the graph to determine the solutions.

• x= -2 and x= -3

• x= 2 and x= 3

• x= -2 and x= 3

• x= 2 and x= -3

Solve: (x + 4)(x + 7) = 0

• x = 4 and 7

• x = -4 and 7

• x = 4 and -7

• x = -4 and -7

Solve: (x - 8)(x + 7) = 0

• x = 8 and 7

• x = 8 and -8

• x = 8 and -7

• x = -8 and 7