QUADRATIC RELATIONS II REVIEW (WORKSHEET) For questions 1 to 10, choose the best answer. 1. Which expression is equivalent to (x – 3)(x + 3)? A x2 – 6x + 9 C x2 – 9 B x2 + 6x + 9 D x2 + 9 2. Which expression is the result of expanding and simplifying (3x + 1)(4x – 3)? A 12x2 – 12 B 12x2 – 5x – 3 2 C 12x + 5x – 3 D 12x2 – 5x + 3 3. Which expression is the result of expanding and simplifying (x + 14)2? A B C D x2 + 196 x2 + 28x + 196 x2 + 14x + 196 x2 – 196 4. Which expression is the factored form of x2 + x – 30? A (x + 5)(x – 6) B (x + 6)(x – 5) C (x + 15)(x – 2) D (x – 15)(x + 2) 5. Which is the y-intercept of the relation y = 2x2 + 6x + 7? A2 C6 B 3.5 D7 6. Which expression is the factored form of –3x2 – 3x + 6? A –3(x + 2)(x – 1) B –3(x – 2)(x + 1) C 3(x + 2)(x – 1) D 3(x – 2)(x + 1) 7. Which expression is the factored form of 6x2 – 54? A B C D 6(x – 3)(x – 3) 6(x + 3)2 6(x – 3)(x + 3) 6(x – 3)2 Foundations for College Mathematics 11: Teacher’s Resource BLM 5–14 Chapter 5 Practice Test 8. Which relation is the same as y = –3(x + 4)2 + 5? A y = 3x2 + 8x + 21 B y = –3x2 – 24x + 5 C y = –3x2 + 8x – 43 D y = –3x2 – 24x – 43 9. Which is the equation for the axis of symmetry for the relation y = (x – 2)(x + 6)? A x=2 C x = –6 B x = –2 D x = –8 10. What are the zeros of the relation y = 3x2 – 15x + 12? A 4 and 1 C –4 and–1 B 0 and 1 D –4 11. Answer true (T) or false (F) for each statement. a) The x-intercepts is another term for the zeros. b) The greatest common factor of 6x2 + 15x + 18 is 6. c) The y-intercept of y = x2 + 6x + 5 is 5. d) The relation y = 5(x – 4)2 + 6 is written in vertex form. e) The relation y = 2(x – 3)(x + 4) is written in standard form. f) The parabola, y = –(x + 2)2 – 3, has 2 zeros (x–intercepts). 12. Write an equation for each quadratic relation in vertex form. a) y = –2x2 + bx + c with a vertex at (–3, 4) b) a = 6, and a minimum value of 12 at x = 4 13. Express each relation in vertex form by determining the zeros, axis of symmetry, and sub & solving for the y-coordinate. a) y = x2 + 2x – 24 b) y = –3x2 – 12x + 63 Copyright © 2007 McGraw-Hill Ryerson Limited