Solving Quadratic Equations by Factoring and Graphing

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

Solve by graphing.

• (0, -3) & (0, 3)

• (0, 3)

• (3, 0)

• (-3, 0) & (3, 0)

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

Complete the square:

x² + 6x + ____

• x² + 6x + 9

• x² + 6x - 36

• x² + 6x + 36

• x² + 6x - 9

Complete the square:

x² + 14x + ____

• x² + 14x - 196

• x² + 14x + 49

• x² + 14x - 49

• x² + 14x + 196

Complete the square:

x² + 10x + ____

• x² + 10x - 100

• x² + 10x + 100

• x² + 10x - 25

• x² + 10x + 25

How many solutions does this graph have?

• one

• two

• no real solutions

• cannot be determined

• No solution

• 0

• 1

• 2

• Cannot be determined from the given information