chapter 3 quiz 1 review – factoring and solving quadratic...
TRANSCRIPT
Math 2B/3A
Ms. Sheppard-Brick 617.596.4133 http://lps.lexingtonma.org/Page/2434
Name: Date:
1
Chapter 3 Quiz 1 Review – Factoring and Solving Quadratic Equations Students Will Be Able to:
• Use vocabulary to describe polynomial expressions • Factor polynomials that have a common factor, including a binomial common
factor. • Factor monic quadratics using Sums and Products Factoring • Factor polynomials using Difference of Squares factoring • Factor non-‐monic Quadratics using Splitting the Middle Term • Factor polynomials that require using more than one step or strategy • Factor polynomials by completing the square • Solve quadratic equations using the Zero Product Property (ZPP) • Solve quadratic equations using the Quadratic Formula
Note: any topics covered on the previous two quizzes are fair game on this quiz. Remember to review old quizzes and review sheets to make sure you are still comfortable with these topics. Practice Problems: Complete these problems on a separate sheet of paper. Be prepared to turn in your work. All work must be shown to earn any credit!
1. Use the polynomial 𝑝 𝑥 = −6𝑥! + 5𝑥 − 2𝑥! + 4− 3𝑥 a. Write 𝑝(𝑥) in standard form. b. What is the leading coefficient? c. What is the degree of 𝑝(𝑥)? d. What is the quadratic coefficient of 𝑝(𝑥) in standard form? e. Find 𝑞 𝑥 such that 𝑝 𝑥 + 𝑞 𝑥 = 2𝑥 + 4 f. Find 𝑟(𝑥) such that 𝑝 𝑥 − 𝑟 𝑥 = −3𝑥! − 5𝑥! + 2𝑥 + 5 g. Name 𝑞(𝑥) and 𝑟(𝑥) based on their number of terms.
2. Given the polynomial 𝑓 𝑥 = 3𝑥! − 4𝑥, find a polynomial that fits each description.
a. A polynomial 𝑔(𝑥) such that 𝑓 𝑥 ∗ 𝑔(𝑥) has degree 5. b. A polynomial 𝑘(𝑥) such that 𝑓 𝑥 + 𝑘(𝑥) has degree 3. c. A polynomial 𝑚(𝑥) such that 𝑓 𝑥 −𝑚 𝑥 = 6 d. What is the linear term of 𝑓(𝑥)? e. What is the constant term of 𝑚(𝑥)?
3. Write a polynomial in one variable that fits each description.
a. A linear binomial with a constant of −4 in standard form. b. A quadratic trinomial with a linear coefficient of 3. c. A 6th degree monomial. d. A 4th degree binomial with no cubic term in standard form.
Math 2B/3A
Ms. Sheppard-Brick 617.596.4133 http://lps.lexingtonma.org/Page/2434
Name: Date:
2
4. Factor each of the following using GCF factoring. a. 2𝑥 3𝑥 − 4 − 7 3𝑥 − 4 b. 𝑥 2𝑥 + 1 − (2𝑥 + 1)
c. 12𝑥! − 4𝑥! d. 5𝑥!𝑦 + 15𝑥𝑦! − 20𝑥𝑦
5. Factor each of the following using Sums and Products Factoring a. 𝑥! − 6𝑥 − 7 b. 𝑥! + 2𝑥 − 35
c. 𝑥! + 21𝑥 + 110 d. 𝑥! − 11𝑥 + 24
6. Factor each of the following using Difference of Squares Factoring
a. 49𝑦! − 64 b. (𝑚 + 4)! − 25
c. 121− 16𝑝! d. 81𝑘! − 100𝑚!
7. Factor each of the following using Splitting the Middle Term
a. 6𝑥! − 7𝑥 − 5 b. 5𝑥! − 33𝑥 + 18
c. 4𝑥! − 𝑥 − 3 d. 6𝑥! − 𝑥 − 12
8. Factor each of the following by Completing the Square.
a. 𝑥! − 6𝑥 − 112 b. 𝑥! + 18𝑥 + 72
c. 𝑥! − 20𝑥 + 99 d. 𝑥! + 4𝑥 − 165
9. Fully factor each of the following using an efficient method. Name the method used.
a. 𝑥! + 12𝑥 + 27 b. 𝑥! − 8𝑥 − 105 c. 2𝑥! − 5𝑥! d. 5𝑥! + 14𝑥 − 3 e. 25𝑥! − 144
f. 𝑥! − 12𝑥 + 27 g. 4𝑥! − 9 h. 𝑥! − 28𝑥 + 192 i. 3𝑥! + 17𝑥 − 28 j. 16𝑥!𝑦! − 4𝑥!𝑦! + 8𝑥𝑦!
10. Factor each of the following completely. You will need to use more than one technique.
a. 5𝑥! + 15𝑥! − 20𝑥 b. 12𝑥! − 7𝑥! − 10𝑥 c. 16𝑥! − 1 d. 2𝑥! − 28𝑥 + 98
e. 75𝑥! − 27𝑥 f. 𝑥! + 10𝑥! − 24𝑥 g. 3𝑥! − 6𝑥! − 45𝑥 h. 8𝑥! − 20𝑥 − 12
11. Solve each of the following equations. Use an efficient method. a. 𝑥! − 5𝑥 = 14 b. 𝑥! − 40 = −3𝑥 c. 𝑥! + 4𝑥 = 165
d. 36𝑥! = 25 e. 0 = 𝑥! + 4𝑥 + 1 f. 9𝑥! + 36𝑥 = −31
12. Use the discriminant to determine how many Real Number solutions each of the
equations has. You do not need to solve. a. 9𝑥! + 12𝑥 + 4 b. 3𝑥! + 4𝑥 + 12
c. −5𝑥! + 4𝑥 + 10 d. 𝑥! − 5𝑥 − 66