Chapter 2 Review

• Study for tomorrow’s test tonight!!

• #64 $15.00 #9 (x + 3), (x – 2), (x + 5)• #65 440 units #11 (x – 4), (x – 2)• #66 x2 = 1800, p = $23.00 #13 (x – 1), (x + 1), (x –

2), (x + 2)• #48 (0, 2)U(2, ∞) #15 (x – 3), (x – ( ))• #49 (-∞, -2)U(-2, 3) #17 y = 7x3 – 2x2 – 5x + 3• #50 (-∞, -⅓)U(⅓, ∞) #19 y = x5 – 6x2 – x – 3

#21 [0, 3]• #7 (x + 5), (x + 6)

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Chapter 2 Review

Solve• Remember:

– When you see “Solve” and there are two variables, you graph!

– When there is one variable with no instructions, go by the easiest means possible!!

• Solve:

Solving for x Algebraically• If you are told to solve

algebraically without a specific method, use the one that is easiest for you!

• Solve for x algebraically:

32 1y x

cos 0 0,4x on

3 23 4x x x

3 1 5x

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Chapter 2 Review

Sign Patterns Profit/Revenue/Cost

2 30

1

x

x

2 2 15 0x x

• Make a sign pattern for thefollowing functions:

• John sells widgets at $5 each, but it costs him $1.50 to make each widget. He has fixed costs of $200.– Write the total cost equation– Graph it and give the D and R– Write the total revenue

equation– When will John break even?– What does (16.5, -142.25)

mean in the total profit equation?

Chapter 2 Review

Word Problems• Know:

– Rectangle problems– Area/perimeter of a rectangle– Area/circumference of a circle– Volume/surface area of a box

• Be able to mix and mingle these functions together based upon given information!

Deriving the Quadratic Formula

• You derive the quadratic formula by completing the square from ax2 + bx + c = 0!

• Use as many or as little steps as you need to portray that you know what you are doing and that I can follow your work!