Solving Equations by Factoring and Graphing

Solve with graphing:

2x² + 7x - 15 = 0

• -1.5 or 5

• No Solution

• -5 or 1.5

• 0.7 or 5

How many solutions does this graph have?

• one

• two

• no real solutions

• cannot be determined

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

What are the solutions?

• 0 and 8

• -2 and -4

• 3 and -1

• 2 and 4

After you solve for x, how do you get y?

• guess

• throw down your pencil and walk away

• plug the x value into one of the original equations

• graph

Due to the lines being the same, what is the solution?

• Infinite Solution

• No solution

• x+3

• y-3

What is the solution for this graph? (black dot)

• (2, -1)

• (2, 1)

• (-2, -1)

• (-2, 1)

Which method of solving System of Equations requires you to determine the intersection?

• Graphing

• Substitution

• Elimination

When using the graphing method, what does it mean if the lines are parallel?

• The system has infinitely many solutions

• The system can be solved by substitution

• The system has no solution

• The system has one solution